COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 5, Problem 59QAP
To determine
(a)
Tension on the string when the metal washer is at the bottom of the circular path.
To determine
(b)
Tension on the string when the metal washer is at the top of the circular path.
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8-
A ball of mass m = 0.4 kg moves in a vertical circular path on a string L= 1 m. If its speed is 7 m/s at the top of the circle, what is the tension in the string at that point?
O A) 15.68 N
O B) 3.92 N
O 9 ON
O D 23.52 N
O Đ 35.28 N
Q1) Circular motionA carnival ride has people stand inside a vertical cylinder with theirbacks to the wall. The cylinder starts spinning counterclockwise and theriders find that they are “stuck” to the wall and don’t slide down, evenwhen the floor is removed.The ride has a radius of r. The person has a mass of m and is movingwith a constant speed of v. The coefficient of static friction between theperson and the wall is μs , and kinetic friction μk. The person is onlytouching the wall, not touching the floor.a) Draw a free body diagram for the person when they are on the left-hand side, as shown.Clearly label all forces. Use the notation used in class.b) What is the magnitude and direction of the acceleration of the person?Give your answer in terms of variables only (r, v, m, μs, μk, and g)c) What is the magnitude of the normal force of the wall on the person?Solve this problem using Newton’s 2nd Law. Show all your work.Give your answer in terms of variables only (r, v, m, μs, μk, and…
CNM PHYSICS, ASTRONOMY & ENGINEERING
8-12
EF on an Incline and in a Circle
B'
B
C
D
OD'
Figure 8.
Q19 If the acceleration of the body is toward the center, what is the direction of the
unbalanced force?
Q20 Using the equation for Newton's 2nd Law for uniform circular motion and the
parameters currently set in your interactive, calculate the magnitude of the force acting on the
object to keep it in circular motion. Show all of your work below. Does your value match the
interactive's value for the net force acting on the object?
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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- An object executes circular motion with constant speed whenever a net force of constant magnitude acts perpendicular to the velocity. What happens to the speed if the force is not perpendicular to the velocity?arrow_forwardA car of mass 1 230 kg travels along a circular road of radius 60.0 m at 18.0 m/s. (a) Calculate the magnitude of the cars centripetal acceleration. (b) What is the magnitude of the force of static friction acting on the car? (See Section 7.4.)arrow_forwardA car moves at speed v across a bridge made in the shape of a circular arc of radius r. (a) Find an expression for the normal force acting on the car when it is at the top of the arc. (b) At what minimum speed will the normal force become zero (causing the occupants of the car to seem weightless) if r = 30.0 m?arrow_forward
- A 23 kg box of garbage is connected by a massless string to a post on a frictionless table. The string is 1.5 m long. There is no appreciable friction between the post and the string. If the tension in the string is 71 N while the garbage slides in a uniform circle toward a disposal bin, how long does it take for the box to make one complete revolution? a) 3.5 s b) 2.2 s c) 1.2 s d) 4.4 s e) 5.4 sarrow_forwardA load of 52 kg is placed on the flatbed of a truck going around a section of flat road corresponding to a circular arc with a radius of 80 m. If the coefficient of static friction between the load and the truck's flatbed is 0.355, what is the maximum speed the truck can have so the load won't slide? a) 28.0 m/s b) 5.33 m/s c) 16.7 m/s d) 22.6 m/s e) 279 m/sarrow_forwardA string is attached to a 120-gram wooden cube. The string turns in a horizontal circle of radius 5.0 cm but make angle of 25° below the horizontal. a) Calculate the tension in the string B) Calculate the speed of the wooden block.arrow_forward
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