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If impulse/ varies with time t as f (kg ...

If impulse/ varies with time t as f `(kg ms^(-1))=20t^(2)-40t`.The change in momentum is minimum at

A

t=2s

B

t=1s

C

`t=(1)/(2)s`

D

`t=(3)/(2)s`

Text Solution

Verified by Experts

The correct Answer is:
B
(b) Impulse is defined as rate of change of momentum. For change in momentum to be minimum
`(d)/(dt) ( 20t^(2)-400t)=0`
40t-40=0
t=1s
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