a., Q:A 12.23 kg box made of rubber is on dry asphalt at rest. 5 - A 5.0 kg dog sits on the floor of an elevator that Ch. with, Q:6. This diagram indicates all types of, Q:6. International units for power are watts (W) For most people, a systolic pressure less than 90 mm Hg is considered low. A spring is stretched by applying a force to it by hands. Since the floor is smooth , contribution of all frictional forces = 0. a) What is the tension in the rope if he climbs at, Q:7a. (b) What is the tension in the string? The mass of the car is 1000.0 kg. (a) What Is the tension in the rope if he climbs at a constant speed? For this situation, draw a free-body diagram and write the net force equation. 5 - Running indoors on a treadmill is slightly easier Ch. The coefficient of static friction between the box and the bed of the truck is 0.800. Calculate the force required to push the sled across the field. against the sled, how large must the horizontal force e to keep the sled moving? 5 - a. What happens to friction as the applied force is Consider two blocks, A and B, where m, < mp. S A 18 N B. (a), A:When a body is at rest, the force that is required to just start the motion of the object from rest, Q:55. How much force must he apply to the sled? 5 - A 22-cm-diameter bowling ball has a terminal speed Ch. When a 1.50-kg dress hangs midway from a taut clothesline stretched between two poles planted 7.50 m apart, the clothesline is seen to sag 0.0500 m. a. Get access to millions of step-by-step textbook and homework solutions, Send experts your homework questions or start a chat with a tutor, Check for plagiarism and create citations in seconds, Get instant explanations to difficult math equations. (b) The elevator accelerates upward momentarily at the rate of 2 m/s2. The scale reads 334 N. What is If the resulting acceleration is 0. N as, Q:5. 60 N C. 180 N D. 600 N magnitude of each object's velocity is the same after impact as before, but direction changes Acceleration of sled (b) What is the tension in the string? mass of rock m= 3 kg k is always longer than r (or the distance to the segmental CG). a. Coefficient of kinetic, Q:A rope is used to pull a 2.89-kg bucket of water out of a deep well. 5 - Zach, whose mass is 80 kg, is in an elevator Ch. What does the scale read now? Applicant must have a valid driver's license. 200 kg football blocking sled is 0.20. The max mechanical advantages for the brachialis, biceps, and brachioradialis occur between angles at the elbow of approximately 75-90 degrees. A force of 45 Newtons is required to start a 5.0 kg box moving across a horizontal. the best answet. 60 N C. 180 N D. 600 N 5 - The drag force is an important fact of life for Ch. of mass m. The, Q:atus: We reviewed their content and use your feedback to keep the quality high. v = 0 (because finally the dummy stops), Q:A 9000 kg airplane accelerates upward at 2.0 m/s2. -yes, because of the more weight, width doesn't matter I = moment of inertia Q:C8. Describe the moment arm during bicep curl? Here m signifies car mass, and a signifies, Q:PUSHING BLOCKS BASE We have to, Q:The rocket sled shown in Figure 4.5 accelerates at a rate of 30.0 m/s2. A 0.250 kg toy car moving with a speed of .860 m/s collided with a wall. a. Conceptual question: The block below slides with constant velocity under the action Friction The figure below represents a cart viewed from above being pulled by two children A box rests on the back of a truck. The object slow down with an acceleration of -5 m/s2. . the point around which the mass and weight of a body are balanced in all directions OR The point about which the sum of torques produced by the weights of the body segments is equal to zero. Its passenger has a mass of, Q:9000 kg airplane accelerates upward at 2.0 m/s. Perfectly plastic: objects deform and stick together m = mass Product of force and the amount of displacement in the direction of that force (means by which energy is transferred from one object or system to another) A Mark for Review 5 - Three objects move through the air as shown in Ch. You'll get a detailed solution from a subject matter expert that helps you learn core concepts. The relative angle present at the joint is close to the angles of attachment of the elbow flexors. m.a= Fnet Impulse = Ft First week only $4.99! Do wide-track tires = better traction over normal width tires? *Response times may vary by subject and question complexity. 1. e = hb/hd Determine the lift force exerted on the plane by, A:Given data: Thus, to be in equilibrium, the body COM must be within the boundaries of the base of support. What does the scale read then? given that Free body diagram, Q:Q5) A child pulls a wagon with a force of 20N by a rope making an angle of 25 The ramp is tilted at 20 and is frictionless. 5 - An impala is an African antelope capable of a Ch. 5 - The forces in Figure P5.10 are acting on a 2.0 kg Ch. -energy absorbed and lost through deformation A boy pushes the sled and it near a forest A person stands on a scale inside an elevator at rest (Figure 2.54). A box rests on the back of a truck. The coefficient of static, A:Given: force acting over the area of contact between two surfaces in the direction opposite that of motion or motion tendency, maximum amount of friction that can be generated between two static surfaces (F = uR), constant-magnitude friction generated between two surfaces in contact during motion. Determine the coefficient of kinetic friction between the player and the sled. W = work done 5 - A stubborn 120 kg pig sits down and refuses to Ch. 5 - What is the minimum downward force on the box in Ch. C. 18 N B. Coefficient of static frictions=0.30 A 7.0-N force parallel to an incline is applied to a 1.0-kg crate. The coefficient of static friction between sled and grass is 0.73, and the coefficient of kinetic friction between sled and grass is 0.68. the collision. B. The coefficient of kinetic friction between the grass and the sled is 0.30. 5 - The two angled ropes are used to support the crate Ch. The coefficient of kinetic friction between the grass and the sled is 0.30. F = 400 N negligible mass. An object is at rest an will remain at rest, Ability to resist a disruption of equilibrium A farmer pulls the leash of a stubborn, 200 kg pig Must have experience with both pets and livestock animals in a commercial setting and some experience with wildlife and exotic animals. If the COR between the ball and floor is 0.7, how high will the ball bounce? -As a muscle's velocity of contraction increases, its maximum force of contraction decreases, capacity to do work Acceleration of the elevator = a= ??? As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 s. Its mass is 0.145 kg. acceleration due to, Q:There is a 67 kg rubber sled on a wet concrete floor. -a mechanical advantage greater than 1.0 allows the force applied (muscle) to be less than the resistive force to produce an equal amount of torque the pencil does not, A:As per Newton's third law, there is always an equal and opposite force to every force. 60 N Kf C. 180 N | 60kg D. 600 N Disti Show transcribed image text Expert Answer Dear (b) Find the maximum acceleration the truck can have before the box slides. Tucking reduces moment of inertia about the hands, so less torque will be required to rotate about the hands. This problem has been solved! Transcribed Image Text: Friction Group Practice Problem: The coefficient of dynamic friction between the grass and a 200 kg football blocking sled is 0.20. What is an example of law of acceleration? Part A 0.000065. . See Answer How much force must he apply to the sled?A. F = 20 N 3. A small rock (m-3 kg) and a car (m-1000 kg) stay still on flat ground. of 25 N. 4 *The crew members are applying an impulse to the toboggan to change the toboggan's momentum from zero to a max amount. Group Practice Problem: The coefficient of dynamic friction between the grass and a When the elevator is accelerating downward at 3.8m/s2 , the scale reads 60 N. (a) What Is the mass of the backpack? How much force must he apply to the sled? A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. Experts are tested by Chegg as specialists in their subject area. The rotary effect created by an applied force (i.e. (c) Assume that the upper block does not slip on the lower block, and find the acceleration of each block in terms of m and F. Figure P4.68. William Moebs, Samuel J. Ling, Jeff Sanny. When a muscle contracts it pulls on points of attachment A. He is standing on a Ch. a. D.900 N 5 - When you bend your knee, the quadriceps muscle is Ch. Find answers to questions asked by students like you. A 1000-kg car pushes a 2000-kg trck with a dead battery The wheels of the car push on the road, Q:Q5. You can specify conditions of storing and accessing cookies in your browser, A football player at practice pushes a 80 kg blocking sled across the field at a constant speed. A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. What is a resultant joint torque in the body? A 100 kg block shown is acted upo by 60 N C. 180 N D. 600 N 1 See answer Advertisement JemdetNasr Answer: C. 180 N Explanation: (b) What is the net force on the car? 60 N 18 N 600 N C. d. Show Answer Create an account. 5 - A 1000 kg car traveling at a speed of 40 m/s skids Ch. v = velocity. Mass of sled m = 80 kg Here a = acceleration . K = 0.30, 2. 5 - Land Rover ads used to claim that their vehicles Ch. 5 - Two blocks on a frictionless table, A and B, are Ch. The rider applies the brakes, causing the motorcycle to accelerate at a rate of 5 m/s2. A marble is placed in a graduated cylinder, which was filled to the 20 mL mark. One is a 2000N forward push by the, Q:A man pushes a 92 kg crate with 272 N of force.The crate experiences a force of friction Median response time is 34 minutes for paid subscribers and may be longer for promotional offers. A discus thrower exerts an average force of 1000 N against the discus while the discus moves through a displacement of 0.6 m in the direction of this force. near a deser mass of the boat (m) = 1000 kg a) What is the net acceleration on the box?, Q:Mary applies a force of 75 N to push a box with an acceleration of 0.43 m/s?. 5 - A 2200 kg truck has put its front bumper against Ch. If the engine generates a 4200 N Applied force,, A:Given data: For equilibrium, the center of pressure must be directly below the body COM Calculate the force required to push the sled across the field. Show that the mass will slide down the plane if s tan , where s is the coefficient of static friction between the block and the plane. (90 kg)(+6 m/s) + (80 kg)(-7 m/s) = (170 kg)(v). 5 - A 75 kg passenger is seated in a cage in the Sling Ch. 5 - In Figure Q5.21, block 2 is moving to the right. Ch. 5 - The three ropes in Figure P5.1 are tied to a Ch. (b) What is the size of the force acting on it? 5 - For Questions 17 through 20, determine the tension Ch. The coefficient of kinetic friction between the grass and the sled is .30.Part AHow much force must he apply to the sled?ANSWER:Problem 9Zach, whose mass is 73 kg, is in an elevator descending at 12 m/s . Start your trial now! A 20.O-g ball hangs from the roof of a freight car by a string. The force of the bat on the, Q:Alberto tries to move a 23.3 kg desk that is stopped on a horizontal surface, just as Alberto If you, A:Alberto tries to move a 23.3 kg desk that is stopped on a horizontal surface, just as Alberto If you, Q:Q2 As illustrated in Fig., consider two workers who are trying to move a block. Two football players are pushing 60 kg blocking sled across the field at a constant speed of 2.0 m/s. 5 - An early submersible craft for deep-sea Ch. What is torque and how do we calculate it? 5 - A 50 kg box hangs from a rope. The coefficient of kinetic friction between the grass and the sled is 0.30. The surfaces of the blocks are rough. Compare the force block A, A:Given: a. 5 - a. F = average force applied to an object 60 N C. 180 N D. 600 N. Find answers to questions asked by students like you. a. force acting during impact has 2 effects: Want better grades, but cant afford to pay for Numerade? (a) What is the force of, A:Given - Get free access to expert answers Get 3 free question credits A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. A car is, Q:Dynamics - A 4 kg block sitting on a table is pulled to the right by a 15 N force. A. 60 N C. 180 N D. 600 N Expert Solution Want to see the full answer? 5 - Two workers are sliding a 300 kg crate across the Ch. PROBLEM 4: A 1100-kg car pulls a boat on a trailer. The scale reads 800 N. (a) What is the person's mass? Get 5 free video unlocks on our app with code GOMOBILE, A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. Mass of drone = 0.30 kg The force of friction on the sled, A:Since you have posted a question with a multiple sub parts, we will solve first three sub - parts, Q:Sledding A sled with a mass of 80.0 kg is pulled 300 N How much force must he 'apply to the sled? Explicitly show how you follow the steps in the Problem-Solving Strategy for Newton's laws of motion. What is, A:Here given the mass 15 kg is on incline with a coefficient of static friction 0.875 . angle of inclination of ramp, = 20o Angle,=140, Q:A hoist is used to lift a 780 kg car upward with an acceleration of 0.110 m/s. (b) vehicle and accelerates at a rate, A:The mass of the trailer ismt=700kg The coefficient of kinetic friction between the grass and the sled is 0.30. What is the net force on the motorcycle? a. A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. H1 = H2 Two blocks, A of mass 10 kg and B of mass 30 kg, are side by side and in contact Solo Practice Practice 17 Questions Show answers Question 1 900 seconds Q. d = displacement of an object along the line of action of the force. A. (a) When the truck accelerates forward, what force accelerates the box? How much force must he apply to the sled?A. Complete the following table Assume that your brain is 40 cm from your heart and that =1060kg/m3\rho=1060 \mathrm{kg} / \mathrm{m}^{3}=1060kg/m3 for your blood. down with a speed of VA= 3 m/s. DESTION 7 1 W = 1 J/s If a 100 kg footbail player only pushes horizontally against the sled, how large must the horizontal force e to keep the sled moving? A: v = 7.78 m/s in the direction of the force application, product of a force and the time over which the force acts Watch these videos for an in-depth look. 200 N Balanced OR Unbalanced If a 100 kg footbalil player only pushes horizontally against the sled, how large must the horizontal force e to keep the sled moving? Draw a free-body diagram on a coordinate plane for this situation. 5 - A construction crew would like to support a 1000 Ch. The static, A:Given A 58 kg person steps on a scale in an elevator. 5 - Two blocks are connected by a string as in Figure Ch. -more stable = able to resist a larger force, point about which the ground reaction force is balanced, Area enclosed by all points at which the body contacts a supporting surface. No human can push on a bat with that much force. since its constant speed , so applied force = friction forceFapp = F frictionF app = N ;F = . Your question is solved by a Subject Matter Expert. Here,F1 is the, Q:A 20 kg box rests on a table. 5 - The 100 kg block in Figure P5.76 takes 6.0 s to Ch. William Moebs, Samuel J. Ling, Jeff Sanny. Displacement of the object along the line of action of the force during the time the force acts on the object. How much force must he apply to the sled? 5 - What forces are acting on you right now? accelerates 0.01, Q:6. From the, Q:The rocket sled shown in Figure 4.5 accelerates at a rate of27.0m/s2. We have to calculate net force acting, Q:An object has a mass of 300 kg. 5 - What is the tension in the rope of Figure P5.42 Ch. No movement - Isometric muscle action (no mechanical work), -rate of doing work a) What is the net, Q:A boy pulls a carriage with a force of 20N by a thick rope making an angle of 25 with the, A:Neglect friction since the coefficient of friction isn't given (increases in impact velocity and temp increase COR). The coefficient of kinetic friction between the grass and the sled is 0.30. A football player at practice pushes a 60 kg blocking sled across the field at a constant speed. EX: GRF. Product of muscle tension and muscle moment arm produces a torque at the joint crossed by the muscle, Muscles develop tension-->pulling on bones to support or move a resistance, moment arm (force) / moment arm (resistance) Question 4 Forward force on the boat (F) = 2000 N, Q:A car with a mass of 1000.0 kg accelerates from 0 to 90.0 km/h in 10.0 s. (a) What is its, A:a)Weknow,V=u+atgiven,V=90km/h=90x1033600=25m/su=0t=10, Q:A force of 35.0 N is required to start a 6.0-kg box moving across a horizontal concrete floor. The answer is independent of the velocity of the gymnastshe can be moving up or down or can be instantly stationary. When the human body acts as a projectile, the body's CG follows a parabolic trajectory, regardless of any changes in the configurations of the body segments while in the air. How does power relate to force and velocity? How much force must he apply to the sled? If crew members apply an average force of 100 N in the direction of motion of the 90 kg toboggan for a period of 7.0 s before jumping in, what is the toboggan's speed at that point? 5 - Two blocks are at rest on a frictionless incline, Ch. 5 - A wood block, after being given a starting push, Ch. The mass of the boat plus trailer is 700 kg. 18 N B. (a), Q:Q5) A child pulls a wagon with a force of 20N by a rope making an angle of 25 with the Scale reads = 334 N = F answer choices 1 Ns 6 Ns 33.3 Ns Question 2 900 seconds Q. 5 - A 3.0 kg puck slides due east on a horizontal Ch. 60 N C. 180 N D. 600 N How much force must he apply to the sled 1 See answer Advertisement okpalawalter8 Answer: The value is Explanation: [units: kg m2] 5 - Running on a treadmill is slightly easier than Ch. over his shoulder at the same angle above the, Q:QUESTION 6 The coefficient, Q:3. The coefficient of kinetic friction between the grass and the sled is 0.30. I = mk2 The coefficient of kinetic friction between the grass and the sled is 0.30.Part AHow much force must he apply to the sled?ANSWER:Problem 9Zach, whose mass is 73 kg, is in an elevator descending at 12 m/s . vertically down at the rate of 30, A:Given data : What is happening in this instance? 5 - a. The mass of the baseball is 145 g (.145 kg). 18 N B. The ramp is tilted at 20 and is frictionless. and, A:F1=8N,30abovehorizontalF2=10N,45belowhorizontalf=-6N,alonghorizontalNetforce, Q:Problem 5: Two blocks are connected by a massless rope as shown below. A 7.0-N force parallel to an incline is applied to a 1.0-kg crate. (I)1 = (I)2, When angular momentum is conserved, there is a tradeoff between MOI and angular velocity..discuss this, Fully tucked position: low MOI, high angular velocity -MOI (I) reduces when the diver goes from a layout to a tuck and then increases as the diver opens up to enter into the water. block on the, Q:9) Two blocks, A and B, are being pulled to the right along a horizontal surface by a horizontal, Q:Group Practice Problem: A 100 kg shot putter pushes forward and upward on a 4 kg A 90 kg hockey player skating with a velocity of 6 m/s collides head-on with an 80 kg player traveling at 7 m/s. vo = 13.4 m/s (130 mi/h) The coefficient of static friction is s, and P is directed at angle below the horizontal. at the angle shown. How much force musthe apply to the sled? You'll get a detailed solution from a subject matter expert that helps you learn core concepts. A car with a mass of 1000.0 kg accelerates from 0 to 90.0 km/h in 10.0 s. (a) What is its acceleration? If the force of friction including air resistance is 250 N and the acceleration of the car is 1.80 m/s2, what is the mass of the car plus its occupants? (b) What is the force in the hitch between the car and the trailer if 80% of the resisting forces are experienced by the boat and trailer? What lever class is most used in the human body? Can the normal force on an object be directed Ch. The elevator takes 4.0 s to brake to a stop at the first. A football player at practice pushes a 60 kg blocking sled across the field at a constant . -The higher the position of the CG, the greater the potentially disruptive torque created if the body undergoes an angular displacement. Generally the force that must be applied to the sled is equal to the frictional force experienced by the sled which is mathematically represented as, This site is using cookies under cookie policy . 5 - The air is less dense at higher elevations, so Ch. One is a 2000N forward push, Q:A boat moves through the water with two forces acting on it. One is a 1,950-N forward push by the, A:(a) 18 N B. The mass of the boat plus trailer is 700 kg. K = 0.30 2. How much force must he apply to the sled? When she increases the, Q:A 2.0-kg block is on a perfectly smooth ramp that makes an angle of 30 with the horizontal. Depends on qualifications and experience. ---When the line of action of a body's weight (directed form the CG) moves outside the base of support, a torque is created that tends to cause angular motion of the body, thereby disrupting stability, with the CG falling toward the ground. Kneticiricton betweentne Eras_ Fmnera Sene A Suppose you place a block of mass M on a plane inclined at an angle . If he exerts a, Q:A baseball accelerates forward when it is hit by the bat as shown in the image below. A 5.00105 -kg rocket is accelerating straight up. What does knee angle do to MOI in a sprinter? A 50 kg box hangs from a rope. Suddenly your Ch. Status. 2003-2023 Chegg Inc. All rights reserved. 5 - The forces in Figure P5.11 are acting on a 2.0 kg Ch. What is the tension produced on the clothesline by the dress? 60 N C. 180 N D. 600 N Expert's Answer Solution.pdf Next Previous Related Questions Q: TO (a) What Is the tension in the rope if he climbs at a constant speed? 0.875. What is the tension in the rope if (b) If all other conditions are the same but the ramp has a friction force of 1.9 N, what is the acceleration?