COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 5, Problem 70QAP
To determine
Angle that the table can be tilted without being slide
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4) 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.
9-v4
The box shown in the figure is being ac-
celerated by pulling on it with the rope.
(a) Assume the floor is frictionless.
the maximum force that can be applied with-
out causing the box to tip over?
(b) Repeat part a, but now let the coefficient of
friction be µ.
What is
(c) What happens to your answer to part b when
the box is sufficiently tall? How do you interpret
this?
2а
m
2b
9) Two blocks are positioned on surfaces, each inclined at the same angle of 48.2 degrees with respect to the horizontal. The blocks are connected by a rope which rests on a frictionless pulley at the top of the inclines as shown, so the blocks can slide together. The mass of the black block is 2.62 kg, and the coefficient of kinetic friction for both blocks and inclines is 0.250. Assume static friction has been overcome and that everything can slide. What is must be the mass of the white block if both blocks are to slide to the LEFT at an acceleration of 1.5 m/s^2?
Question 9 options:
1.12 kg
6.55 kg
4.11 kg
2.49 kg
10) Two blocks are positioned on surfaces, each inclined at the same angle of 50.3 degrees with respect to the horizontal. The blocks are connected by a rope which rests on a frictionless pulley at the top of the inclines as shown, so the blocks can slide together. The mass of the black…
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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- 8-63. 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 , = 0.2, 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 127 10 L C A 300 mmarrow_forwardEX) 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_forward6.) A friend is helping you move and is pulling a 100 kg refrigerator by a rope. The rope is secured around the fridge's center of mass, so it won't tip. Your friend is on the short side; they're pulling on the rope such that it makes a 10-degree angle below the horizontal. Which statement is true about the fridge's normal force? A) n> 980 N B) n= 980 N C) n<980 N D) Not enough information to sayarrow_forward
- Q3) Determine the force in members GH, GB and GC of the truss used to support the sign, and state if the members are in tension or compression. (30 pts) 3 m 4 m 4 m 600 N 600 Narrow_forward7.- A small block of mass m=0.3 kg is placed inside an inverted cone that rotates about a vertical axis, so that the duration of one revolution of the cone is T. The walls of the cone form an angle = 30° with the vertical. The coefficient of static friction between the block and the cone is us=0.4. If the block must be kept at a constant height h=0.5 m above the vertex of the cone, what maximum and minimum values can T have? A: Tin 0.58 s, Tm 1.475 8: Tmin 0.51 s, Tma-1 42 s C: Problema 7 Tm-0.71 s Tm 2.225 D: Tmin=0,65 s, Ta-1.98 s E Tmin=0.41 s, Tmax=1.225arrow_forward6-70. Determine the horizontal and vertical components of force at pins B and C. The suspended cylinder has a mass of 75 kg 03 m B 15 m 0.5 m Prob. 6-70arrow_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_forwardA skydiver jumps out of a stationary helicopter and falls straight downward. During his fall: a) Immediately after he jumps out the drag force is much smaller than his weight, so he accelerates downwardsb) The kinetic friction of the air on the skydiver does not depend on his speed, so he falls at constant accelerationc) His weight depends on the normal force with the air so his falling speed is slowedd) Skydivers move at low Reynolds numbers so he is slowed by the viscous force of drag e) The normal force keeps him from accelerating as he fallsarrow_forward24 in. 2 m 24 in 18 in 1 m 1.5 m Prob. 5-66 Prob 5-69. Determine the tens components of reaction at D N he uniform concrete slab has a mass of 2400 kg Determine the tension in each of the three parallel supporting cables when the slab is held in the horizontal vity plane as shown. ATA A TB 30 TC 15 kN 400 N 2 m 0.5 m 2 m C1m1 m Prob. 5-67arrow_forward
- 7) Two blocks are positioned on surfaces, each inclined at the same angle of 57.2 degrees with respect to the horizontal. The blocks are connected by a rope which rests on a frictionless pulley at the top of the inclines as shown, so the blocks can slide together. The mass of the black block is 7.31 kg, and the coefficient of kinetic friction for both blocks and inclines is 0.510. Assume static friction has been overcome and that everything can slide. What is must be the mass of the white block if both blocks are to slide to the LEFT at a constant velocity? Question 7 options: 14.47 kg 7.31 kg 10.89 kg 3.69 kg 8) Two blocks are positioned on surfaces, each inclined at the same angle of 40.6 degrees with respect to the horizontal. The blocks are connected by a rope which rests on a frictionless pulley at the top of the inclines as shown, so the blocks can slide together. The mass of the black block is…arrow_forward6) A 80kg box standing on a floor has a coefficient of static friction of 0.7. A boy approaches the box and leans horizontally against it. The maximum force the boy can exert before the box begins to slip (in N) is: A) 618 B) 425 C) 549 D) 332 E) 392arrow_forwardIn the figure below, a climber leans out against a vertical ice wall that has negligible friction. Distance a is 0.956 m and distance L is 2.00 m. His center of mass is distanced = 0.944 m from the feet-ground contact point. If he is on the verge of sliding, what is the coefficient of static friction between feet and ground? ---Select-- v com-arrow_forward
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