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A projectile is fired from the origin wi...

A projectile is fired from the origin with a velocity `v_(0)` at an angle `theta` with x-axis. The speed of the projectile at an altitude `h` is .

A

`v_(0) cos theta`

B

`sqrt(v_(0)^(2) - 2gh)`

C

`sqrt(v_(0)^(2) sin^(2)theta-2gh)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
`K_(i) + U_(i) =K_(f) + U_(f)`
`:. 0 + 6=(1)/(2) xx 1 xx v^(2) + 2`
`:. v =sqrt(v_(0)^(2)-2gh`.
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