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A stone is thrown with an initial speed ...

A stone is thrown with an initial speed of ' 4.9 ms^(-1)' from a bridge in vertical upward direction. If falls down in water after `2` seconds. The height of the bridge is.

A

4.9m

B

9.8m

C

19.8m

D

24.7m

Text Solution

Verified by Experts

The correct Answer is:
B
`h = ut + 1/2 g t^2`
`rArr h = -4.9 xx 2 + 1/2 xx 9.8 xx 4 = 9.8m`
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