Conceptual Physical Science Explorations
Conceptual Physical Science Explorations
2nd Edition
ISBN: 9780321567918
Author: Paul G. Hewitt, Leslie A. Hewitt, John A Suchocki
Publisher: Addison Wesley
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Textbook Question
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Chapter 5, Problem 12RQ

Which requires the greater impulse, stopping something dead in its tracks or stopping it and then reversing its direction?

Expert Solution & Answer
Check Mark
To determine

Whether the stopping something dead in its track or stopping it and then reversing its direction requires the greater impulse.

Answer to Problem 12RQ

Something requires greater impulse to stop and reverse the direction than to stop dead in its track due to more time for the force to stop and reverse the direction.

Explanation of Solution

The impulse of a body is the effect of the force that acts for some duration on the body. It is also the same as the change in the momentum of the body. If the force acts for a small duration on the body, then the change in the momentum of the body will also be small. If the same force acts for more time, than the change in momentum becomes high.

The time necessary for stopping something dead in its track is less than the time that is necessary to stop it and reverse the direction. The time necessary to stop something and reverse its direction is more because the force acts for more duration, so it requires the greater impulse.

Conclusion:

Therefore, something requires greater impulse to stop and reverse the direction than to stop dead in its track due to more time for the force to stop and reverse the direction.

Chapter 5 Solutions

Conceptual Physical Science Explorations

Ch. 5 - Which is the greater change in momentum, stopping...Ch. 5 - Which requires the greater impulse, stopping...Ch. 5 - When can the momentum of two moving objects be...Ch. 5 - What does it mean to say that momentum (or any...Ch. 5 - When a cannonball is fired, its momentum does...Ch. 5 - When a cannonball is fired, the cannon recoils. Is...Ch. 5 - When a cannonball is fired, is momentum conserved...Ch. 5 - Distinguish between an elastic collision and an...Ch. 5 - Railroad car A rolls at a certain speed and makes...Ch. 5 - If the equally massive cars of the previous...Ch. 5 - Calculate the momentum of a 10kg bowling ball...Ch. 5 - Calculate the momentum of a 50-kg carton that...Ch. 5 - Calculate the impulse that occurs when an average...Ch. 5 - Calculate the impulse that occurs when the same...Ch. 5 - The balls have different masses and speeds. (a)...Ch. 5 - Evan pushes crate starting at rest across a floor...Ch. 5 - When rollerblading, why is a fall less harmful on...Ch. 5 - In terms of impulse and momentum, why do air bags...Ch. 5 - Prob. 3TECh. 5 - In terms of impulse and momentum, why are nylon...Ch. 5 - If you throw an egg against a wall, the egg will...Ch. 5 - A lunar vehicle is tested on Earth at a speed of...Ch. 5 - Which has the greater momentum when they move at...Ch. 5 - In answering the preceding exercise, perhaps you...Ch. 5 - Why do 6-ounce boxing gloves hit harder than...Ch. 5 - Which undergoes the greatest change in momentum:...Ch. 5 - In the preceding question, in which case is the...Ch. 5 - If a fully loaded shopping cart and an empty one...Ch. 5 - A fully dressed person is at rest in the middle of...Ch. 5 - Michael throws a ball horizontally while standing...Ch. 5 - Two football players have a head-on collision and...Ch. 5 - In the previous chapter, rocket propulsion was...Ch. 5 - When you are travelling in a car at highway speed,...Ch. 5 - If an 18-wheeler tractor-trailer and a sports car...Ch. 5 - Your friend says that law of momentum conservation...Ch. 5 - How much impulse is needed to stop a 10kg bowling...Ch. 5 - A car with a mass of 1000kg moves at 20m/s. Show...Ch. 5 - A car carrying a 75kg test dummy crashes into a...Ch. 5 - Jane (mass 40.0kg), standing on the slippery ice,...Ch. 5 - A 2kg ball of putty moving to the right has a...Ch. 5 - A railroad diesel engine weighs four times as much...Ch. 5 - Prob. 7TSCh. 5 - A 1kg ostrich egg is thrown at 2m/s at a bedsheet...Ch. 5 - If fast Freddy doubles his running speed, what...Ch. 5 - A 1kg ball has the same speed as a 10kg ball....Ch. 5 - Two iron, balls, one twice the mass of other, are...Ch. 5 - If the mass of a cart full of groceries decreases...Ch. 5 - Your friend says that the impulse equals momentum....Ch. 5 - The impulse-momentum relationship is a direct...Ch. 5 - Which of the following equations best illustrates...Ch. 5 - When you jump from an elevated position to the...Ch. 5 - Standing on a stakeboard, you toss a ball...Ch. 5 - A big fish swims upon and swallows a small fish at...

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Impulse Derivation and Demonstration; Author: Flipping Physics;https://www.youtube.com/watch?v=9rwkTnTOB0s;License: Standard YouTube License, CC-BY