University Physics Volume 1
18th Edition
ISBN: 9781938168277
Author: William Moebs, Samuel J. Ling, Jeff Sanny
Publisher: OpenStax - Rice University
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Textbook Question
Chapter 6, Problem 73P
A child of mass 40.0 kg is in a roller coaster car that travels in a loop of radius 7.00 m. At point A the speed of the car is 10.0 m/s, and at point B, the speed is 10.5 m/s. Assume the child is not holding on and does not wear a seat belt. (a) What is the force of the car seat on the child at point A? (b) What is the force of the car seat on the child at point B? (c) What minimum speed is required to keep the child in his seat at point A?
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A child of mass 40.0 kg is in a roller coaster car that travels in a loop of radius 9.50 m. At point A the speed of the car is 14.8 m/s, and at point B, the speed is 15.6 m/s. Assume the child is not holding on and does not wear a seat belt.
A
B
30°
(a) What is the force (in N) of the car seat on the child at point A? (Enter the magnitude.)
(b) What is the force (in N) of the car seat on the child at point B? (Enter the magnitude.)
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(c) What minimum speed (in m/s) is required to keep the child in his seat at point A?
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B
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205.6
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(b) What is the force (in N) of the car seat on the child at point B? (Enter the magnitude.)
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Two packing crates of masses m, = 10.0 kg and m, = 7.30 kg are connected by a light string that passes over a frictionless pulley as in the figure below. The 7.30-kg crate lies on a smooth incline of angle 43.0°.
Find the following.
m,
(a) the acceleration of the 7.30-kg crate
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Chapter 6 Solutions
University Physics Volume 1
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