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Velocity-time equation of a particle mov...

Velocity-time equation of a particle moving in a straight line is `v=2t-4` for `t le 2s` and `v= 4-2t` for `1 gt 2s`. The distance travelled ( in meters) by the particle in the time interval from `t=0` to `t=4s` is 4k. The value of 'k' is ( Here t is in second and v in m/s) :

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