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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

`1 ms^(-1)`

B

`10 ms^(-1)`

C

`8 ms^(-1)`

D

`3 m^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
C
Velocity ofthe ball after timet
`1= sqrt(v_(x)^(2)+v_(y)^(2))`
`=sqrt((4)^(2)+("gt")^(2))`
`=sqrt(16++(10xx0.7)^(2))`
`=8 ms^(-1)`
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