A) 60 kg m/s
B) 120 kg m/s
C) 67.5kg m/s
D) 30 kg m/s
Correct Answer: A
Solution :
The impulse \[(F\Delta t)\] given to a body is equal to the change in the momentum \[(\Delta p)\]of the body. i.e., \[\Delta p=F\,\Delta \,t\] Given, \[F=30\,N,\,\Delta t=2s\]. \[\therefore \] \[\Delta p=30\times 2=60\,kg\,m/s\]. Note: Impulse is a vector quantity, its direction is same as that of the force.You need to login to perform this action.
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