A shopper in a supermarket pushes a cart with a force of 28 N directed at an angle of 30° downward from the horizontal. Find the work done by the shopper on the cart as the shopper moves along a 55 m length of aisle.

Suppose you were asked to find the torque about point p due to the normal force n in terms of given quantities. which method of finding the torque would be the easiest to use?

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

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.