Posted by Caitlin on Sunday, February 27, 2011 at 8:22pm.
I just need ideas on how i can estimate the height of a building by using only a tennis ball and a stop watch. I can only measure it by being on the ground level.

Physics  bobpursley, Sunday, February 27, 2011 at 8:25pm
Can you throw the ball up as high as the roof? If so, time the ball from the top of the arc to when it hits ground
h=1/2 g t^2

Physics  Yangyang, Thursday, March 10, 2011 at 4:35pm
A tennis ball of mass m = 0.058 kg and speed v = 26 m/s strikes a wall at a 45^\circ angle and rebounds with the same speed at 45^\circ .
What is the magnitude of the impulse given to the ball?
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