Abowling ball of mass 8 kg hits a wall going 5 m/s and rebounds at a speed of 4 m/s. what was the impulse applied to the bowling ball?
a. 40 kg'm/s
b. 32 kg'm/s
c. 72 kg'm/s
d. 8 kg'm/s

Impulse, J = 72 kg-m/s

Explanation:

It is given that,

Mass of the ball, m = 8 kg

Initial velocity of the ball, u = 5 m/s

Final velocity of the ball, v = -4 m/s (as it rebounds back)

We need to find the impulse applied to the bowling ball. We know that impulse is equal to the change in momentum of an object i.e.

J = -72 kg-m/s

Negative sign shows the impulse is applied in opposite direction. So, the correct t option is (c). Hence, this is the required solution.

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thermal energy is the answer