If the movie "super gorilla" King Kong beats his chest on a frozen frictionless lake, will he go backward? Why?

A machine gun is fired at a steel plate. Is the average force on the plate from the bullet impact greater if the bullets bounce off or if they are squashed and stick to the plate? Explain.

(a) When a large car collides with a small car, which one undergoes the greater change in momentum: the large one or the small one? Or is it the same for both? (b) In light of your answer to part (a), why are the occupants of the small car more likely to be hurt than those of the large car, assuming that both cars are equally sturdy?

How does a lettuce spinner remove water from lettuce?

When rain falls from the sky, what becomes of the momentum of the raindrops as they hit the ground? Is momentum conserved for a system consisting of just a raindrop? Is momentum conserved if the system includes a raindrop and the earth? Explain.

When rain falls from the sky, what happens to its momentum as it hits the ground? Is your answer also valid for Newton’s famous apple?

When rockets were first suggested, some people scoffed that they would not work in space because there is nothing out there for them to push against. So why do they work in space, since there really is nothing out there for them to push against?

It takes $42$ gal of water to produce $1 \text{lb}$ of broccoli. This is twice the amount of water used to produce $1 \text{lb}$ of lettuce. How many gallons of water does it take to produce $1 \text{lb}$ of lettuce?

A woman stands in the middle of a perfectly smooth, frictionless, frozen lake. She can set herself in motion by throwing things, but suppose she has nothing to throw. Can she propel herself to shore without throwing anything?

When a catcher in a baseball game catches a fastball, he does not hold his arms rigid but relaxes them so that the mitt moves several inches while the ball is being caught. Why is this important?

Explain the terms "macrohardness" and "microhardness."

The moon is accelerating toward the earth. Does this mean that it is getting closer to our planet? Explain your reasoning.

(a) If the momentum of a single object is equal to zero, must its kinetic energy also be zero?
(b) If the momentum of a pair of objects is equal to zero, must the kinetic energy of those objects also be zero?
(c) If the kinetic energy of a pair of objects is equal to zero, must the momentum of those objects also be zero? Explain your reasoning in each case.

When you're riding a slow Ferris wheel, you may feel slightly lighter at the top of the wheel, and a little heavier at the bottom. If the wheel keeps accelerating, however, at a certain speed of rotation you'll feel weightless at the top, and double your normal weight at the bottom. What's special about this particular rotation speed?