Tue July 03, 2012 By:

Dear Sir/Madame, I was unable to understand the momentum-time referred in the video lesson by the expert Ms. Manjushree Choudhary. Please help

Expert Reply
Tue July 03, 2012
The momentum time graph where momentum is along the y axis and time along the x axis. The force will be equal to the slope as we know from Newton's 2 nd law of motion, rate of change of momentum is proportional to force and it takes place in the same direction as the force is applied.
and  force: F=(mxchange in velocity)/t
                  =(change in mv)/t    , as mass is constant
                  =change in momentum/t
Slope of the graph=AB/BC
AB=change in momentum
BC= time taken for this change
so slope=force
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