A truck is traveling horizontally to the right (Fig. 4–-38). Whenthe truck starts to slow down, the crate on the (frictionless)truck bed starts to slide. In what direction could the netforce be on the crate?(a) No direction. The net force is zero.(b) Straight down (because of gravity).(c) Straight up (the normal force).(d) Horizontal and to the right.(e) Horizontal and to the left.FIGURE 4–38MisConceptual Question 1.

A truck is travelling horizontally to the right. As the truck starts to slow down, the crate on the…

Answered: A truck is traveling horizontally to…

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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IS A) 171 N (B)262 N C) 387 N D) 398 N Do only two 16 – 18 only. 16)A 30.0-kg block is being pulled up a 25.0° slope by a force of 575 N which is parallel to the slope, but the block does not slide up the slope. What is the minimum value of the coefficient of static friction required for this to happen? | us = 575-30 x 9.8 Sin25° + Ox cos cOsZ %3D 9860 eSこ 7.51
"A worker drags a crate across a factory floor by pulling on a rope tied to the crate. The worker exerts a force of magnitude F = 400N on the rope, which is inclined at an upward angle q = 30° to the horizontal, and the floor exerts a horizontal force of magnitude f = 125N that opposes the motion. Calculate the magnitude of the acceleration (in the unit m/s2) of the crate if its mass is 200 kg." 1.11 1.21 1.31 1.41 O O O O
10. A man pulls a box from rest with a horizontal force F across a frictionless surface a distance d. (a) If he were to repeat this process by pulling the rope at an angle of 20° above the horizontal, the final velocity of the box increases decreases stays the same Justify your answer.
A force of 25 N acts to the right on a 100.0 kg block which is at rest on a rough surface( Us = 0. 200). The frictional force acting upon the block is: 171 N 196 N None of the above 25 N
(a) Briefly explain the different between statics friction and kinetics friction. (b) The uniform crate has a mass of 35 kg. If a force P = 55 N is applied on to the crate, determine the coefficient of static friction. (Figure 3). P= 55 N 0.8 m 30° 0.2 m Figure 3
The weight on the left is 50 grams and the distance from the center point is 4 units. The distance of the force on the right (Fr) to the center is 2 units and B=120°. Calculate the Fr value. left side right side 50 grams Fr A) 2 N B) 3.7 N C) 1.2 N D) 2.5 N E) 7N
2) Dallas is on her ATV when she gets stuck in the mud. The only way she can get out is if a helicopter gives it a pull. With one side of the rope secured around a tree, determine the tension P in the rope needed to pull Dallas' ATV up the incline at an acceleration of 3 ft/s?. Assume that both angles are equal to e = 30°, the weight of the ATV is 500 Ib, and the kinetic coefficient of friction between the ATV and the ground is 0.30. %3D P Hx = 0.3
27 Go Body A in Fig. 6-33 weighs 102 N, and body B weighs 32 N. The coefficients of friction between A and the incline are 0.56 and P = 0.25. Angle 0 is 40°. Let the positive direction of an x axis be up, the incline. In unit-vector notation. what is the acceleration of A if A is initially (a) at rest. (b) moving up the incline, and (c) moving down the incline? 0 Frictionless, massle pulley Figure 6-33 Problems 27 and 28.
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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