A 51.9-kg skater is standing at rest in front of a wall. By pushing against the wall she propels herself backward with a velocity of -2.25 m/s. Her hands are in contact with the wall for 0.999 s. Ignore friction and wind resistance. Find the average force she exerts on the wall

A 51.9-kg skater is standing at rest in front of a wall. By pushing against the wall she propels herself backward with a velocity of -2.25 m/s. Her hands are in contact with the wall for 0.999 s. Ignore friction and wind resistance. Find the average force she exerts on the wall

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 41PQ: There is a compressed spring between two laboratory carts of masses m1 = 105 g and m2 = 212 g....

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Concept explainers

Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”

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Expert Solution

Step 1

The average force exerted on the wall can be given by

$F_{a v g} = \frac{m (v - u)}{t}$

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