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Question

The linear momentum `P’ of a moving body in one dimensional frame varies with time as P=xyt2, where x and y are position constants. The rate of change of momentum is the force that acts on the body.
In such a case the force is


Your Answer
A
Proportional to t2
Correct Answer
B
Proportional to t
Your Answer
C
Inversely proportional to t2
Your Answer
D
Inversely proportional to t

Solution

The correct option is A Proportional to t
P=x+yt2
f=dpdt
dp2
dpdt=2yt
as `2y’ is constant 
Ft

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