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Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class11  >>  Laws of Motion
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The linear momentum p of a moving body varies with time according to equation $p=a+bt^2$ where a,b are constants. Net force acting on the body is

a) Constant

b) proportional to $t^2$

c) Inversely proportional to t

d) proportional to t

Can you answer this question?
 
 

1 Answer

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$F=\large\frac{dp}{dt}=\frac{d}{dt}$$(a+bt^2)$
$F=2bt$
$ f \;\alpha\; t$
Net force acting on the body is proportional to t
Hence d is the correct answer.

 

answered Jul 4, 2013 by meena.p
edited Jan 26, 2014 by meena.p
 

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