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A ball is projected on smooth inclined p...

A ball is projected on smooth inclined plane in direction perpendicular to line of greatest slope with velcoity of `8m//s`. Find it's speed after `1sec`.

A

`10 m//s`

B

`12 m//s`

C

`15 m//s`

D

`20 m//s`

Text Solution

Verified by Experts

The correct Answer is:
A
After `t=1` sec, the speed increases with
`a=g sin 37^(@)=6 m//s^(2)`
`:. V_(y)=g sin 37^(@)xx1=6 m//s`
`:.` speed `=sqrt(8^(2)+6^(2))=10 m//s`
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