A bowling ball has a mass of $6 \mathrm{~kg}$ and a speed of $1.5 \mathrm{~m} / \mathrm{s}$. A baseball has a mass of $0.12 \mathrm{~kg}$ and a speed of $40 \mathrm{~m} / \mathrm{s}$. Which ball has the larger momentum?

If momentum is conserved in a collision, does this indicate conclusively that the collision is elastic. Explain

Is the collision in question 24 elastic, partially inelastic, or perfectly inelastic? Explain.

A railroad car collides and couples with a second railroad car that is standing still. If external forces acting on the system are ignored, is the velocity of the system after the collision equal to, greater than, or less than that of the first car before the collision? Explain.

A skateboarder jumps on a moving skateboard from the side. Does the skateboard slow down or speed up in this process? Explain, using conservation of momentum

Would the sailor in this picture be better off with the sail furled (down) or unfurled (up)? Explain

What are the directions of the forces acting on the fan and on the sail due to these changes in momentum?

What are the directions of the change in momentum of the air at the fan and at the sail?

Suppose an astronaut in outer space suddenly discovers that the tether connecting her to the space shuttle is cut and she is slowly drifting away from the shuttle. Assuming that she is wearing a tool belt holding several wrenches, how can she move herself back toward the shuttle? Explain.

Suppose that you are standing on a surface that is so slick that you can get no traction at all in order to begin moving across this surface. Fortunately, you are carrying a bag of oranges. Explain how you can get yourself moving.

Is it possible for a rocket to function in empty space (in a vacuum) where there is nothing to push against except itself? Explain.

When a cannon rigidly mounted on a large boat is fired, is momentum conserved? Explain, being careful to clearly define the system being considered.

Two shotguns are identical in every respect (including the size of shell fired) except that one has twice the mass of the other. Which gun will tend to recoil with greater velocity when fired? Explain.

If you have access to a pool table, try parts a and b of the observations in home experiment 1 on the pool table. What effect does putting spin on the first ball have on the collisions?