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CBSE Class 9 Answered

A ball falls from a tower and reaches the ground in 5s. Find (a) The height of the tower. (b) the acceleration after 2s. (c) The velocity with which the ball strikes the ground. (g=10m/s2)
Asked by Rasika mahajan | 17 Sep, 2013, 11:30: PM
Expert Answer
u = 0, g = 10 m/s2.
(a) The height of tower is
 
(b) The acceleration on the ball is acceleration due to gravity. Hence, at every point it is 10 m/s2.
 
(c) The velocity is
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