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CBSE Class 9 Answered

A ball hits a wall horizontally at 6.0m/s.It rebounds horizontally at 4.4m/s.The ball is in contact with wall for 0.040s.What is the acceleration of the ball?
Asked by Prachi Jha | 27 Jun, 2014, 08:44: AM
answered-by-expert Expert Answer

Initial velocity of the ball = 6 m/s

Final velocity of the ball = - 4.4 m/s (negative sign as the ball is rebounding back horizontally,i.e. in the opposite direction )

Time , t =0.04 s

Syntax error from line 1 column 49 to line 1 column 73. Unexpected '<mstyle '.

Therefore the acceleration of the ball = -260 m/s2

Answered by Jyothi Nair | 27 Jun, 2014, 09:08: AM

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