If the mass of an object is 44 kilograms and its velocity is 10 meters per second east, how much kinetic energy does it have? 0.44 joules 2,200 joules 220 joules 4,400 joules 440 joules

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.)