A 3 kg ball strikes a heavy rigid wall with a speed of 10 m s - 1 at an angle of 60 ° with the wall. It gets reflected with the same speed at 60 ° with the wall. If the ball is in contact with the wall for 0 . 2 s , the average force exerted on the ball by the wall is

Question

A 3 kg ball strikes a heavy rigid wall with a speed of 10 m s - 1 at an angle of 60 ° with the wall. It gets reflected with the same speed at 60 ° with the wall. If the ball is in contact with the wall for 0 . 2 s , the average force exerted on the ball by the wall is, 300 N, zero, 150 3 N, 150 N

MARKS App · Accepted Answer

F = 2 m v sin θ t = 2 × 3 × 10 sin ⁡ 60 ° 0.2 = 150 3 N

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