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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))`

A

2.70s, 20 m/s

B

1.70s, 30 m/s

C

4.70s, 50m/s

D

10s, 50 m/s

Text Solution

Verified by Experts

The correct Answer is:
A
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