A 0.5kg ball moving with a speed of 12m/s strikes a hard wall at angle of 30° with the wall. It is reflected with the same speed and at the same angle. If the ball is in contact with the wall for 0.25 seconds, the average force acting on wall is?
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Answer:
Average force = Chane in momentum/ Time
= 2musintheta/ time
= 2 × 5/10 × 12 × sin 30° ÷ 0.25
Aftersolving
= 24 N
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