(II) A 20.0-kg box rests on a table. (a) What is the weight of the box and the normal force acting on it? (b) A 10.0-kg box is placed on top of the 20.0-kg box, as shown in Fig. 4-38. Determine the normal force that the table exerts on the 20.0-kg box and the normal force that the 20.0-kg box exerts on the 10.0-kg box. 10.0 kg 20.0 kg

(II) A 20.0-kg box rests on a table. (a) What is the weight of the box and the normal force acting on it? (b) A 10.0-kg box is placed on top of the 20.0-kg box, as shown in Fig. 4-38. Determine the normal force that the table exerts on the 20.0-kg box and the normal force that the 20.0-kg box exerts on the 10.0-kg box. 10.0 kg 20.0 kg

Name: 5. (II) A 20.0-kg box rests on a table. (a) What is the weightof the
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Description: 5. (II) A 20.0-kg box rests on a table. (a) What is the weightof the box and the normal force acting on it? (b) A10.0-kg box is placed on top of the 20.0-kg box, as shownin Fig. 4-38. Determine the normal force that the tableexerts on the 20.0-kg bo

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter4: Newton's Laws Of Motion

Section4.4: Static Friction Forces

Problem 4.7QQ: Suppose your friend is sitting on a sled and asks you to move her across a flat, horizontal field....

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Consider Figure 5.28. The driver attempts to get the car out of the mud by exerting a perpendicular force of 610.0 N, and the distance she pushes in the middle of the rope is 1.00 m while she stands 6.00 m away from the car on the left and 6.00 m away from the tree on the right. What is the tension Tin the rope, and how do you find the answer?
ODI 48. (II) A small box is held in place against a rough vertical wall by someone pushing on it with a force directed upward at 28° above the horizontal. The coefficients of static and kinetic friction between the box and wall are 0.40 and 0.30, respectively. The box slides down unless the applied force has magnitude 23 N. What is the mass of the box? 49. (II) Two crates, of mass 65 kg and 125 kg, are in contact and at rest on a horizontal surface (Fig. 4-57). A 650-N force is exerted on the 65-kg crate. If the coefficient of kinetic friction is 0.18, calculate (a) the acceleration of the sys- tem, and (b) the force that each crate exerts on the other. (c) Repeat with the crates reversed. 650 N 65 kg 125 kg FIGURE 4-57 Problem 49. 50. (II) A person pushes a 14.0-kg lawn mower at constant speed with a force of F = 88.0 N directed along the handle, which is at an angle of 45.0° to the horizontal (Fig. 4-58). the bed of abou 56. (II) A erates c impedi friction 57. (II) Th m FIGURE 4-5…
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1) A force F =80i + 60j is applied on a body , find the value and direction of applied force
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A rope attached to a 35-lb crate passes around two fixed pegs as shown in Fig. to a wall by a second cord. The coefficient of friction be- tween the two crates is 0.25; between the crate and the floor, 0.25; and between the rope and the pegs, 0.20. Determine the minimum force Pmin that must be used to cause mo- The 45-lb crate is attached tion. P 45 lb 35 lb
16 A loaded penguin sled weighing 80 N rests on a plane - clined at angle 0=20° to the horizontal (Fig. 6-23). Between tbe sled and the plane, the coefficient of static friction is 0.25. and th coefficient of kinetic friction is 0.15. (a) What is the least mag tude of the force F, parallel to the plane, that will prevent the sled from slipping down the plane? (b) What is the minimum magni. tude F that will start the sled moving up the plane? (c) What value of F is required to move the sled up the plane at constant %3D velocity? Fig. 6-23 Problems 16 and 22.
1. A gardener mows a lawn with an old-fashioned pushmower. The handle of the mower makes an angle of 35° withthe surface of the lawn. (a) If a 219-N force is applied along thehandle of the 19-kg mower, what is the normal force exerted bythe lawn on the mower? (b) If the angle between the surface ofthe lawn and the handle of the mower is increased, does thenormal force exerted by the lawn increase, decrease, or stay thesame? Graph and Explain.
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38. 39. FIGURE 4-53 40 Problems 32 and 33. mB Mass ma rests on a smooth horizontal surface; mg hangs istongi inioq le vertically. ni nworda algne 13.0 kg and mB = 5.0 kg in Fig. 4–53, 33. (II) (a) If mA determine the acceleration of each block. (b) If initially is at rest 1.250 m from the edge of the table, how long does it take to reach the edge of the table if the system is allowed to move freely? (c) If mB must ma be if the acceleration of the system is to be kept at 100 g? 1.0 kg, how large %3D