# Physics Force, Time, Momentum and Rotation

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Question Description

1. a cart moving at 10 m/s is brought to a stop by the force plotted in the force-time graph shown here. find the impulse and the approximate mass of the cart. show all your work.

1. a 14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earth’s velocity. earth’s mass is 6.0 x 10^24 kg .show all your work, assuming the rock-earth system is closed.

1. explain why a rapidly spinning gyroscope, mounted in a frame that allows it to rotate in any direction independently of the frame’s rotation, tends to maintain its axis pointed in the same direction in space.

force_and_time_.png

TeacherSethGreg
School: UCLA

Attached.

Force, time, momentum, rotation
Question 1
Force x Time = Mass x Velocity
Ft= MV
From estimation, F=22N, Time = 4s
Impulse (MV)= 22 x 4 = 88Kgm/s
Mass = MV/V = 88kgm/s/10m/s = 8.8kg
Question 2
For the rock: P = mv
P0=Mv0
= (14) x (0...

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Anonymous
awesome work thanks

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