Question

A 7 kg bowling ball rolls off a 20 m high building at 4 m/s. How...

A 7 kg bowling ball rolls off a 20 m high building at 4 m/s. How far from the building did it land horizontally?

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Answer #1

Initial horizontal velocity of bowling ball is

Inital vertical velocity of bowling ball is

Initial height of ball

Time taken by ball to reach ground is

Using kinematics equation   

In the vertical direction ( all downward vectors are taken negative)

In the horizontal direction, ( since )

Horizontal distance traveled by ball during this time is

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