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A particle starts moving rectilinearly a...

A particle starts moving rectilinearly at time t = 0 such that its velocity v changes with time t according to the equation `v = t^2-t`, where t is in seconds and v is in `m s^(-1)`. The time interval for which the particle retrads (i.e., magnitude of velocity decreases)is

A

`t lt 1//2`

B

`1//2 lt t lt 1`

C

`t gt 1`

D

`t lt 1//2 and t gt 1`

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The correct Answer is:
B
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