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A ball is dropped off a high building and strikes the ground with an impact velocity of 30 m/s. The height of the building is
A ball is dropped off a high building and strikes the ground with an impact velocity of 30 m/s. The height of the building is
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Verified answer
Answer:
The height is 45m
Explanation:
Given:
Initial velocity of the ball u=0
Final velocity of the ball when it reaches
the ground v=30m/s
Acceleration = Gravitational acceleration
g=10 m/s²
Height h=?
Using v²=2gh where
a=g=10m/s²
∴ 30²=2×10×h
⇒h=45 m
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