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A girl is standing on the top edge of an...

A girl is standing on the top edge of an 18 m high building. She tosses a coin upwards with a speed of `7.0ms^(-1)`.How long does it take for the Coin to hit the ground ?How fast is the coin going just before it strikes the ground? (`g=10ms^(-2))`

Text Solution

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The correct Answer is:
`2.70 s,20ms^(-10)`
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