Conceptual Physical... -Masteringphysics
Conceptual Physical... -Masteringphysics
6th Edition
ISBN: 9780134079998
Author: Hewitt
Publisher: PEARSON
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Textbook Question
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Chapter 3, Problem 1RCQ

Which has greater momentum: an automobile at rest or a moving skateboard?

Expert Solution & Answer
Check Mark
To determine
The object with greater momentum.

Answer to Problem 1RCQ

The moving skateboard has greater momentum than the automobile at rest.

Explanation of Solution

Express the formula to calculate the momentum.

p=mv

  • p is the momentum
  • m is the mass.
  • v is the speed.

Since the automobile is at rest, its speed is zero. Hence, its momentum is zero. The skateboard which is moving with some speed will have momentum.

Conclusion:

The moving skateboard has greater momentum than the automobile at rest.

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Chapter 3 Solutions

Conceptual Physical... -Masteringphysics

Ch. 3 - Railroad car A rolls at a certain speed and makes...Ch. 3 - If the equally massive railroad cars of Question...Ch. 3 - When is energy most evident?Ch. 3 - Cite an example in which a force is exerted on an...Ch. 3 - Which requires more work: lifting a 50-kg sack a...Ch. 3 - A car is raised a certain distance in a service...Ch. 3 - Two cars are raised to the same elevation on...Ch. 3 - If a moving car speeds up until it is going three...Ch. 3 - What is the relationship between work and power?Ch. 3 - What is the relationship between the gain in...Ch. 3 - Compared with the work that the brakes must supply...Ch. 3 - What will be the kinetic energy of the ram of a...Ch. 3 - An apple hanging from a limb has potential energy...Ch. 3 - Can a machine multiply input force? 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