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A certain rough platform perform oscilla...

A certain rough platform perform oscillating given by `y_(p)=A sin omegat hatj`, while another block kept on the platform perform oscillation on the platform given by
`x_(B)=A cos(omegat)hati`. As seen from, the ground.

A

The direction of frictional force on the block will always be opposite to its velocity relative to the platform.

B

The direction of frictional force on the block will be always opposite to its velocity relative acceleration w.r.t. platform.

C

The direction of frictional force on the block at any instant will be `cos(omegat)hati+sin(omegat)hatj`

D

Direction of friction at any instant will be `sin(omegat)hati+cos(omegat)hatj`

Text Solution

Verified by Experts

`v_(p)=A omega cos omega hatj`
`v_(B)=-Aomega sin(omega t)hatj`
`rArr` Direction of friction `= cos omega t hati+sin omega t hatj`
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