College Physics
10th Edition
ISBN: 9781285737027
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Textbook Question
Chapter 7, Problem 55AP
A 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?
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Question 13: A block of mass M is released at rest and it is under going a
circular motion in a path of radius R as shown in Figure 7. The gravitational
force acts on the block. Assuming that a friction force of magnitude f = b02/3
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as shown in Figure 7 (g is the gravitational acceleration), find the speed of the
block when the block is at 0 = 1/6 angular position (sin(7/6) = 1/2 and
cos(7/6) = v3/2).
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A roller-coaster car at an amusement park has a mass of 1200 kg when fully loaded with passengers. As the car passes over the top of a circular hill of radius 18 m, assume that its speed is not changing. At the top of the hill, what are the (a) magnitude FN and (b) direction (up or down) of the normal force on the car from the track if the car’s speed is v = 11 m/s? What are (c) FN and (d) the direction if v =14 m/s?
Question 13: A block of mass M is released at rest and it is under going a
circular motion in a path of radius R as shown in Figure 7. The gravitational
force acts on the block. Assuming that a friction force of magnitude f = b0²/3
also acts on the block where b is a constant and 0 is the angle with the horizontal
as shown in Figure 7 (g is the gravitational acceleration), find the speed of the
block when the block is at 0 = 1/6 angular position (sin(7/6) = 1/2 and
%3D
cos(7/6) = v/3/2).
m
R
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Figure 7
Chapter 7 Solutions
College Physics
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