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ladolce
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Impulse Momentum Theorem!
A student (m = 63 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.0180 s. The average force exerted on him by the ground is +16000. N, where the upward direction is taken to be the positive direction. From what height did the student fall? Assume that the only force acting on him during the collision is that due to the ground.
impulse momentum theorem
i did it and got vfinal=4.57 and put that over the time, 0.018sec and got 254 m
but that's not right... i don't know why...anyone able to help?
Homework Statement
A student (m = 63 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.0180 s. The average force exerted on him by the ground is +16000. N, where the upward direction is taken to be the positive direction. From what height did the student fall? Assume that the only force acting on him during the collision is that due to the ground.
Homework Equations
impulse momentum theorem
The Attempt at a Solution
i did it and got vfinal=4.57 and put that over the time, 0.018sec and got 254 m
but that's not right... i don't know why...anyone able to help?