2. If a force is applied to the 30- kg cart, show that the 20-kg block A will slide on the cart. Also determine the time for block A to move on the cart 1.5 m. The coefficients of static and kinetic friction between the block and the cart are uA = 0.3 and µB = 0.25. Both the cart and the block %3D start from rest. 1.5 m A F = 200 N

2. If a force is applied to the 30- kg cart, show that the 20-kg block A will slide on the cart. Also determine the time for block A to move on the cart 1.5 m. The coefficients of static and kinetic friction between the block and the cart are uA = 0.3 and µB = 0.25. Both the cart and the block %3D start from rest. 1.5 m A F = 200 N

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Static. Which of the following objects experiences a non-zero static friction? OA. A lamp hanging from the ceiling. OB. A cargo box resting on an inclined ramp. O C. A plow sled being dragged by a buffalo across the field. O D. A fruit freely falling from the tree branch to the ground. Box. A box of mass 1.0 [kg] is resting on the floor when a force of magnitude 20. [N] starts pulling it to the right. The box slides on a rough floor with = 0.20. What is the acceleration of the box? O A. 2.0 [m/s²] O B. 22 [m/s²] OC. 9.0 [m/s²] O D. 18 [m/s²]
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3. Two blocks A and B are connected by a rope and pulled with some force F along a frictionless horizontal surface, as shown. B a. Draw a free-body diagram for each block. b. Write Newton's second law for each block and obtain equations for the x and y directions. c. If the tension in the rope is given by T = F/3, find the ratio of the masses, ma/mg.
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Which of the following is the maximum magnitude of frictional force that Block A will experience?A. 152.9 NB. 41.7 NC. 53.5 ND. 38.2 N
3 decimal place for final answer a. A body weighing 2,225N is being dragged along a rough horizontal plane by a pull of 445N directed at 18o from the horizontal. If fk = 1/12, find the velocity required from rest in the first 3.650m? b. A body weighing 2,225N is being dragged along a rough horizontal plane by a pull of 445N directed at 18o from the horizontal. If fk = 1/12, find the velocity required from rest in the first 5.500m?
Which of the following best approximates the magnitude of the frictional force experienced by Block A?A. 38.2 NB. 41.7 NC. 152.9 ND. 53.5 N
5. A mass of 10kg sits on a level surface. One end of the surface is raised until the block begins to slide down the ramp at a constant velocity and angle of 20⁰. c. What is the Normal Force, N? d. What is the Frictional Force, Ff?
A force 450 N pushes on a 30.7 kg box at an angle of 50° from the horizontal. Starting from rest , the box achieves a velocity of 16.37 m/s in a time of 3.7 s. Find the coefficient of kinetic friction between the box and the floor. a. 0.24 b. 0.45 c. 0.51 d. 0.35 A child on a sled has been given a push so that he is moving up a hill. The hill is covered with icy snow and can be treated as frictionless. The child has a mass of 22.7 kg; the sled has a 3.18 kg. How far will he go before coming to a stop if his speed is 2.44 m/s when he starts at the bottom of the hill? He holds on tightly and so does not fall off the sled, and the hill makes an angle of 25.50 with the horizontal. a. 0.29 m b. 1.14 m c. 1.41 m d. 0.70 m
A 0.5 kg block is pushed up a ramp at a constant velocity between points A and B. The ramp is inclined at an angle of 18°. What is the net force on the block as it moves up the ramp? B A. 4.9 N B. 0.5 N C.ON D. cannot be determined from the information given E. none of the above
MCQ 4. The first of two identical boxes of mass m is sitting on level ground. The second box is sitting on a ramp that makes a 20° angle with the ground. The normal force of the level ground on the first box is NL; the normal force of the ramp on the second box is NR. Which statement is correct? a. NR= NL = mg. b. N₁ mg; NR= mg sin 20°. C. NL = mg; NR = mg cos 20°. d. Nr.= mg; NR= -mg cos 20°. e. NR=-NL = -mg.
9. The 500KN is in contact with a 45° inline. The coefficient of static friction is 0.25. Compute the value of the horizontal force P necessary to Just start the block up the incline. A. 822KN B. 832KN C. 842KN D. 852KN