If a moving object cuts its speed in half, how much momentum will it have?A. the same amount as beforeB. twice as much as beforeC. four times as much as beforeD. one half as much as beforeO E. one fourth as much as before Two ice skaters, Hannah and David, stand facing each other on frictionless ice. Hannah has a mass of 45 kg, David a mass of 80 kg. They then push offfrom each other. After the push, Hannah moves off at a speed of 2.2 m/s to the right. What is David's speed?A. 1.8 m/s ,rightB. 1.0 m/s rightC. 1.2m/s , leftD. 1.7m/s , leftO E. 2.0 m/s left

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Description: If a moving object cuts its speed in half, how much momentum will it have?A. the same amount as beforeB. twice as much as beforeC. four times as much as beforeD. one half as much as beforeO E. one fourth as much as before Two ice skaters, Hannah and

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If a moving object cuts its speed in half, how much momentum will it have? O A. the same amount as before O B. twice as much as before O C. four times as much as before D. one half as much as before O E. one fourth as much as before

If a moving object cuts its speed in half, how much momentum will it have? O A. the same amount as before O B. twice as much as before O C. four times as much as before D. one half as much as before O E. one fourth as much as before

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter10: Systems Of Particles And Conservation Of Momentum

Section: Chapter Questions

Problem 43PQ: A 44.0-kg child finds himself trapped on the surface of a frozen lake, 10.0 m from the shore. The...

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A 45.0-kg girl is standing on a 150.-kg plank. The plank, originally at rest, is free to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.50 m/s to the right relative to the plank. (a) What is her velocity relative to the surface of the ice? (b) What is the velocity of the plank relative to the surface of the ice?
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