Agirl pushes a cart to the left a 100-n force. a boy pushes it to the right with a 50-n force. the net force exerted on the cart is

Astate of matter all that has define volume and can flow is a(n)

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?