Ed W.
asked • 12/05/20College Physics
A 1200 kg car is traveling with a velocity of 5.0 m/s when a traction force of F= (100+50t)/(10t^2) N acts on it. What is the speed of the car after it travels for a time of 10.0 s?
I believe we have to use the impulse momentum equation and integrate the force with respect to time. Yet, i think i did it wrong. Thanks in advance.
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1 Expert Answer
Michael M. answered • 12/05/20
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It seems like there is some typo in this problem due to the integral diverging and by the fact that at t=0, the force is undefined. Plug in a very small value for t such as 0.0001s and you’ll see that the force doesn’t make sense.
Greg S.
Yes. See prior comments on the problem.
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12/05/20
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Luke J.
Are you certain the problem prompt has it dividing by t^2? I ask because when you get to integrating it, you may run into an issue of going from an initial time of t = 0 because you will end up getting a 1 / 0 and, as is well-known, that is undefined.12/05/20