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A body is projected horizontally with a ...

A body is projected horizontally with a velocity of `4 ms^(-1)` from the top of a high tower. The velocity of the body after 0.7 is nearly (Take, `g = 10 ms^(-2))`

A

`10 ms^(-1)`

B

`8 ms^(-1)`

C

`19.2 ms^(-1)`

D

`11 ms^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
B
`v_(y) = g t = 7 ms^(-1), v_(x) = 4 ms^(-1)`
`:. v= sqrt(v_(x)^(2) +v_(y)^(2)) ~~ 8 ms^(-1)`
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