Find the impulse of a 50. kg object under the following scenarios:
a. The object accelerates to 7.5 m/s from rest.
b. The object stops from a velocity of 12.0 m/s.
C. The object change in velocity from 2.2 m/s to 6.3
d. The object hits the ground with 2.5 m/s and rebounds with the same speed

Explanation:

When the velocity of an object changes, it would experience an impulse. If the mass of the object stays the same, and that the object moves along a line, the value of the impulse would be:

, where

On the other hand, the change in the object's velocity can be found with the equation:

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Note that if is in and is in , the unit of would be .

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Note that and are of opposite signs. The reason is that the object's velocity has changed direction in this period.

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b. false

explanation:

suppose a rock in free fall is dropped off a cliff. after falling for 5 seconds, its speed would not be 100 m/s.