COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 5, Problem 41QAP
To determine
The coefficient of kinetic friction between the book and tabletop if the horizontal force applied to the book is equal to one- half of the book's weight.
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8-63. Determine the smallest force P that will cause
impending motion. The crate and wheel have a mass of
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friction between the crate and the ground is , = 0.2, and
between the wheel and the ground, = 0.5.
*8-64. Determine the smallest force P that will cause
impending motion. The crate and wheel have a mass of
50 kg and 25 kg. respectively. The coefficient of static
friction between the crate and the ground is , = 0.5, and
between the wheel and the ground μ = 0.3.
O
O
O
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A
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6-70. Determine the horizontal and vertical components
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Prob. 6-70
In a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If
the 3.5 kg book is pushed from rest through a distance of 0.83 m by the horizontal 31 N force from the broom and then has a speed of
1.0 m/s, what is the coefficient of kinetic friction between the book and floor?
Number
Units
Chapter 5 Solutions
COLLEGE PHYSICS
Ch. 5 - Prob. 1QAPCh. 5 - Prob. 2QAPCh. 5 - Prob. 3QAPCh. 5 - Prob. 4QAPCh. 5 - Prob. 5QAPCh. 5 - Prob. 6QAPCh. 5 - Prob. 7QAPCh. 5 - Prob. 8QAPCh. 5 - Prob. 9QAPCh. 5 - Prob. 10QAP
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- Lisa measured the coefficient of static friction between two pairs of running shoes and the track in Example 6.1 (page 159). If she wants to have an advantage in a race, which shoes should she wear, the ones with a high coefficient or the ones with the low coefficient of static friction? Explain.arrow_forwardA uniform pole is propped between the floor and the ceiling of a room. The height of the room is 7.80 ft, and the coefficient of static friction between the pole and the ceiling is 0.576. The coefficient of static friction between the pole and the floor is greater than that between the pole and the ceiling. What is the length of the longest pole that can be propped between the floor and the ceiling?arrow_forwardIf you press a book flat against a vertical wall with your hand, in what direction is the friction force exerted by the wall on the book? (a) downward (b) upward (c) out from the wall (d) into the wall.arrow_forward
- 5) A 640-N hunter gets a rope around a 3200-N polar bear. They are initially stationary, 20 meters apart, on frictionless level ice. The hunter now pulls on the rope such that she and the polar bear slide closer together. This continues until they eventually meet at some point on the ice. What total distance will the polar bear have slid? a) 1.0 m b) 3.3 m c) 10 m d) 12 m e) 17 marrow_forwardQuestion 7 A 81.17 kg crate is on a frictionless surface inclined at an angle of 0 = 28.64°. A constant external force, P, is applied horizontally to the crate such that it moves a distance of 3.00 m up the incline at constant speed. What is the magnitude of the force P? (740) %3D P. 3.0 m A) O1303.27 N B) O381.27 N C) 0434.42 N D) O14.09 N E) 698.14 N Review Laterarrow_forward70 0• One end of a uniform meter stick is placed against a vertical wall (Fig. P70). The other end is held by a light- weight cord that makes an angle 0 with the stick. The Figure P70 coefficient of static friction between the end of the meter - x - stick and the wall is 0.40. (a) What is the maximum value the angle 0 can have if the stick is to remain in equilibrium? (b) Let the angle 0 be 15°. A block of the same weight as the meter stick is suspended from the stick, as shown, at a distance x from the wall. What is the minimum value of x for which the stick will remain in equilibrium? (c) When 15°, how large must the coefficient of static friction be so that the block can be attached 10 cm from the left end of the stick with- out causing it to slip?arrow_forward
- EX) The uniform crate shown in fig: has a mass of 20 kg. boX IF force P= 80 N is applied to the crate, determine if i remains in equilibrium. The coefficient of static Friction is 0:3 (M=0:3) P= 80N 0.8M Sol) 30° 20 Kg EFx=0>80 Cos 30-F = 0 0.2marrow_forwardEstimate the height of a typical playground slide and theangle its surface makes with the horizontal. A child wearing a different sort of clothing than the first child climbs the ladder to the top of the slide, sits on the slide, lets go of the handrail, and remains at rest. What is the minimum possible value for the coefficient of static friction between this child and the surface of the slide?arrow_forwardFlying Circus of Physics In the figure, a climber with a weight of 540 N is held by a belay rope connected to her climbing harness and belay device; the force of the rope on her has a line of action through her center of mass. The indicated angles are 0 = 40° and p = 35°. If her feet are on the verge of sliding on the vertical wall, what is the coefficient of static friction between her climbing shoes and the wall? Hs-Number i .834 Units No units ✓arrow_forward
- 8-105. A 10-kg cylinder D, which is attached to a small pulley B, is placed on the cord as shown. Determine the largest angles so that the cord does not slip over the peg at C. The cylinder at E also has a mass of 10 kg, and the coefficient of static friction between the cord and the peg is μ = 0.1. PROB. 8-105 A 0 B D 0 Earrow_forwardCurrent Attempt in Progress A child places a picnic basket on the outer rim of a merry-go-round that has a radius of 5.0 m and revolves once every 27 s. (a) What is the speed of a point on that rim? (b) What is the lowest value of the coefficient of static friction between basket and merry-go-round that allows the basket to stay on the ride? (a) Number i (b) Number i Units Unitsarrow_forward4) A 30-kilogram child is sitting 2.0 meters from the centre of a merry-go-round. The coefficients of static and kinetic friction between the child and the surface of the merry-go-round are 0.8 and 0.6, respectively. Determine the maximum speed of the merry-go-round before the child begins to slip.arrow_forward
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