A 0.023 kg golf ball moving at 18.9 m/s crashes through the window of a house in 5.4 * 10-4 s. After the crash, the ball contin - ues in the same direction with a speed of 10.1 m/s.

Assuming the force exerted on the ball by the window was constant, what was the mag - nitude of this force?

Answer in units of N.

Question

Physics

Demetrius Todd

24 August, 09:14

A 0.023 kg golf ball moving at 18.9 m/s crashes through the window of a house in 5.4 * 10-4 s. After the crash, the ball contin - ues in the same direction with a speed of 10.1 m/s.

Assuming the force exerted on the ball by the window was constant, what was the mag - nitude of this force?

Answer in units of N.

+3

Answers (1)

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Donald · Answer 1

Force can be expressed as the time-rate change of momentum

Mathematically, Force = Change in momentum/change in time

Change in momentum = m (10.1-18.9) = - 0.2024

Force = - 2024/5.4 = - 375N (approx)

The significance of the '-' sign is that the direction of force is the opposite that of the direction of our velocities since we assumed them to be positive.

Also this is the force on the ball, the force on the window will be equal and opposite.