A 4.0 kg mass stone is thrown vertically upwards at a speed of 20 m/s. I) determine the maximum height it reaches.
II) Determine your speed when in the
half of its maximum height.
III) Determine the total mechanical energy at this point. of
work performed by the gravitational force from the launch point to the return to that point.

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?

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.

What is the kinetic energy of a baseball moving at a speed of 40 m/s if the baseball has mass of 0.15 kg?