Need help with Physics word problem

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A target lies flat on the ground 4 m from the side of a building that is 10 m tall.The acceleration of gravity is 10 m/s^2 . Air resistance is negligible. A student rolls a 4kg ball off the horizontal roof of the building in the direction of the target. The horizontal speed v with which the ball must leave the roof if it is to strike the target
is most nearly what

Jun 19th, 2015

Thank you for the opportunity to help you with your question!

mgsin tita

4x10 x0.0436

1.77

10^2 + 4^2

100+16

=116

squareroot of 116

10.77 meters

v^2=u^2-2gs

0=u^2-2 x 10 x10.77

u^2=215.4

u=14.68m/s

Please let me know if you need any clarification. I'm always happy to answer your questions.
Jun 19th, 2015

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Jun 19th, 2015
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Jun 19th, 2015
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