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The magnitude of force (in newtons) acti...

The magnitude of force (in newtons) acting on a body varies with timer `t` (in microseconds) as shown in Fig. `AB, BC` and `CD` are straight line segments. The magnitude of total impulse of the force on the body from `t=4s` to `t=16 s` is____________`Ns`

A

`5 xx 10^(-4) N.s`

B

`5 xx 10^(-3)N.s`

C

`5 xx 10^(-5)N.s`

D

`5 xx 10^(-2)N.s`

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