A 5-kg cart moving to the right with a velocity of 16 m/s collides with a concrete wall and rebounds with a velocity of 22 m/s. Is the change in momentum of the cart (a) 0, (b) 40 kg ? m/s, (c) 240 kg ? m/s, (d) 230 kg ? m/s, or (e) 210 kg ? m/s?

PHYS 1010 Notes Week 4 Feb 15 Force and Motion Uniform circular motion: when the speed (v) of an object moving in a circular path of radius r is constant Velocity is changing (because direction is changing) Therefore, it is accelerating Centripetal acceleration: causes curved path All things traveling in curved paths have centripetal acceleration Speed is constant, but velocity is not Acceleration is always directed inward toward the center of the circle "Centrifugal" forces "Centrifugal" force is not real according to Newton's laws As long as there is a normal force pushing on an object, it will n