Q. A 23.0-kg body is moving in the direction of the positive x axis with a speed of 292 m/s when, owing to an internal explosion, it breaks into three pieces. One part, whose mass is 8.5 kg, moves away from the point of explosion with a speed of 302 m/s along the positive y axis. A second fragment, whose mass is 3.0 kg, moves away from the point of explosion with a speed of 382 m/s along the negative x axis. How much energy was released in the explosion?

Q. A 1.5 m-long, 750 g rope pulls a 5.0 kg block of ice across a horizontal, frictionless surface. The block accelerates at 5.0 m/s^2 . How much force pulls forward on the rope?