11. Momentum & Impulse

A250 grubber ball bounces off a wall. As it strikes the wall, it is moving in the negative x-direction at$11\text{m/s}$,and as it bounces off, it is moving in the positive x-direction at$10\text{m/s}$. What is the impulse on the ball from the wall?

What is the momentum of a600 kgcar traveling at$16\text{m/s}$ (about35 mph)?

Three cars approach an intersection: an 800 kg car moves in the positive x-direction at $10\text{m/s}$, a 1200 kg car moves in the negative x-direction at $5\text{m/s}$, and a 900 kg car moves in the positive y-direction at $12\text{m/s}$. What is the total momentum of this system of three cars? Give your answer as a magnitude and an angle counterclockwise from the positive x-axis.