Homework Statement
Two men of equal masses m stand on a platform of mass M. Both men jump with the same horizontal velocity with respect to the platform. Find the relation between velocities of the platform if they jump simultaneously and if they jump one after the other.
Homework...
The distance traveled after coming down the slope is l. We don't know the height. All we know are m, v0=0, alpha, l and k - coefficient of friction.
If at the start point potential energy is 0, than Ep=-mgh at the end. But h is unknown. Since kinetic energy is 0 at both starting and end point...
Homework Statement
A disc of mass m slides with zero initial velocity down an inclined plane set at an angle alpha to the horizontal; having traversed the distance l along the horizontal plane, the disc stops. Find the work performed by the friction forces over the whole distance, assuming the...