A 0.66-kg object with an initial velocity of 3.30 m/s in the positive x-direction is acted on by a force in the direction of motion. The force does 6.50 J of work. What is the final velocity of the object

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.)