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  4. The linear momentum p of a body moving in one dimension varies with time according to the equation p=a+bt2 , where a and b are positive constants. The net force acting on the body is:

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Q. The linear momentum $p$ of a body moving in one dimension varies with time according to the equation $p=a+bt^{2}$ , where $a$ and $b$ are positive constants. The net force acting on the body is:

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Solution:

$F=\frac{d p}{d t}=2bt$