a ball drops from a height, bounces three times, and then rolls to a stop when it reaches the ground the fourth time. At what point is its potential energy greatest? At what point does it have zero kinetic energy? At what point did it have maximum kinetic energy?

Your town is considering building a biodiesel power plant describe at least two advantages and two disadvantages

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.

If a star is moving toward earth, it is