1.

A force F of constant magnitude acts on a block of mass 'm' and t=0,initially along positive x-direction. The direction of force F starts rotating with a constant angular velocity omega in anticlockwise sense. Then the magnitude of velocity of the block as a function of time 't' is ( initial block was at rest )

Answer»

`(F)/( m OMEGA ) SIN ((omegat)/( 2))`
`(2F)/( m omega ) sin ((omegat)/( 2))`
`(F)/( 2 m omega) sin ((omegat)/( 2))`
`(2F)/( 3 m omega) sin ((omegat)/( 2))`

Answer :B


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