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The height y and the distance x along th...

The height y and the distance x along the horizontal plane of a projectile on a certain planet (with no surrounding atmosphere) are given by `y = (8t-5t^(2))` meter and `x = 6t` meter , where t is in second. The velocity with which the projectile is projected is

A

` 8 m//s`

B

`6m //s`

C

`10 m//s`

D

Data is insufficient

Text Solution

Verified by Experts

`v_(y)=dy//dt=8-10t=8` when t=0 (at the time of projection)
`v_(x)=dx//dt=6,v=sqrt(v_x^(2)+v_(y)^(2))=sqrt(8^2+6^(2))`
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