COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 5, Problem 86QAP
To determine
The minimum coefficient of static friction between the wall of the cylinder and the backs of the riders.
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The uniform crate has a mass of 150 kg. If the coefficient of static friction between the crate and the floor is us = 0.2, determine the smallest mass of the man so he can move the crate. The coefficient of static friction between his shoes and the floor is us = 0.45.
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Question 2 - Go Kart Track
Your go karts have a mass of 450kg and travel around a circular curve on a flat,
horizontal track at a radius of 42 m.
a) Draw a diagram to show the go kart on the track and add an arrow to show
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b) The maximum frictional force between the tyres and the road is equal to 20%
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c) Calculate maximum angular velocity at which the car can travel round the
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Chapter 5 Solutions
COLLEGE PHYSICS
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- 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…arrow_forward1) Circular motion, vertical surface, with static friction: At an amusement park, you are on a ride which spins in a horizontal circle of radius R. Your back is to a vertical wall on the inside of the circle. The coefficient of static friction between you and the wall is ,. At a certain speed, the floor drops away, but you don't slide downward against the wall-you stay at "rest" relative to the wall. (Search "Rotor carnival ride" on YouTube to see an example.) a) Draw a FBD of you. b) Determine the minimum radial acceleration such that you don't slide when the floor is gone. dopust c) Determine the minimum tangential speed such that you don't slide when the floor is gone. d) Determine the period of time for you to go around once. e) Determine all these values if R = 10.0 m, , = 0.25. R +You No floor Taxisarrow_forwardA string can support a stationary hanging load of mass 25 kg before breaking. a) Calculate the maximum tension that the string can support. b) Suppose one end of the string is attached to an object of mass m = 3 kg, while the other end is fixed to the center of a frictionless table as shown in the figure. When given an initial speed, the object moves along a horizontal circle of radius R = 0.8 m. Calculate the maximum speed the object can have before the string breaks.arrow_forward
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