1.

A particle of mass m is subjected to a force vec(F) = F_0 [cos(t)hati + sin(t)hatj]. If initially (t=0) the particle was at rest, the kinetic energy particle as a function of time is given by:

Answer»

`(F_0^2)/(m)[1 - COS (2T)]`
`(F_0^2)/m [1 - cos t]`
`(F_0^2)/(m) sin (t)`
`(F_0^2)/m t`

Answer :B


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