Work is done when : 11 point) Oyou push against a wall
you lift a book
O you stand on the floor
O you hold a box

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.

During the past 150 years in the united states, how did energy consumption compare to population growth

What is the period of a wave traveling 5 m/s if its wavelength is 20 m/s