Need help with Physics word problem

User Generated

Oynpxb

Science

Description

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

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Explanation & Answer

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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

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