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a steel ball is dropped from the roof of a building a man standing infront of a 1m high in the building notices that the ball takes 0.1 secs to fall from the top to bottom of the window the ball continues to fall and strikes the ground.On striking the ground,the ball gets rebounded with the same speed with which it hits the ground.if the ball reapperas at the bottom of the window 2secs after passing the bottom of the window on thw way down,then the height of the building is

a steel ball is dropped from the roof of a building a man standing infront of a 1m high in the building notices that the ball takes 0.1 secs to fall from the top to bottom of the window the ball continues to fall and strikes the ground.On striking the ground,the ball gets rebounded with the same speed with which it hits the ground.if the ball reapperas at the bottom of the window 2secs after passing the bottom of the window on thw way down,then the height of the building is
 

Grade:11

1 Answers

Vikas TU
14149 Points
7 years ago
apply second law eqn. from thrown place to the window.
then apply from window to bottom of the ground.
Then again one eqn. when it rebounds from ground to window.
take height = h and solve it.

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