Thank you! A 300 g rubber ball is released from a height of 2.50 m. It falls to

Question

Thank you!

A 300 g rubber ball is released from a height of 2.50 m. It falls to the floor, bounces, and rebounds. The force the floor exerts on the ball is shown in the figure. Ignoring gravity, what is the impulse delivered to the ball during its collision with the floor? 1.80 N-s 2.40 N-s 3.60 N-s 4.80 N-s 7.00 N-s What is the magnitude of the momentum of the ball just after the collision with the floor? Continue to ignore gravity during the collision. 1.50kg-m/s 1.75kg-m/s 2.40 kg-m/s 3.60 kg-m/s 4.80 kg-m/s

Explanation / Answer

36.
Impulse = Fxt
from graph

Impulse = 480x15x10-3 /2 = 3.6 N-s

37. velocity just before collision = (2*g*H)0.5 = 7 m/sec

momentum just before collision =0.3*7 = 2.1 kg-m/s

momentum after collision = 3.6 - 2.1 = 1.5 kg-m/s

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