FIGURE EX11.6 is an incomplete momentum bar chart for a collision that lasts 10 ms. What are the magnitude and direction of the average collision force exerted on the object?

(III) A sled filled with sand slides without friction down a 32° slope. Sand leaks out a hole in the sled at a rate of 2.0 kg/s. If the sled starts from rest with an initial total mass of 45.0 kg, how long does it take the sled to travel 120 m along the slope?

(II) The force on a particle of mass m is given by F (→ above F) = 26 i (→ above i) ― 12t j (→ above j) where F is in N and t in s. What will be the change in the particle’s momentum between t = 1.0 s and t = 2.0 s?

How fast would you have to throw a 150-g rock for it to have the same momentum as a 10-g sniper rifle bullet traveling at 900 m/s?