## Conceptual Physics (12th Edition)

a. Momentum is mv. The ball is moving fastest at point C where it has dropped the most, and slowest at point A. It has the same speed at points B and D. b. KE is $\frac{1}{2}mv^{2}$. The ball is moving fastest at point C where it has dropped the most, and has the most KE there. It is moving slowest at point A and has the least KE there. It has the same speed at points B and D. c. PE + KE = constant. PE is greatest where KE is least, and PE is the least where KE is the greatest.