A bird sitting on the limb of a tree is moving about 30 km/s with respect to the Sun. If the bird takes 1 second to drop down to a worm below, the worm would be 30 km downrange from the bird when it reached the ground. This faulty reasoning is best countered with Newton’s

Which of these is not a form of solar energy?

An iron ball is placed in a pie pan that floats in a bucket. The water level is marked at the side of the bucket. Then the iron ball is removed and allowed to sink in the bucket. The water line at the side of the bucket is

When you simultaneously drop a light tennis ball and a heavy bowling ball, they hit the floor

After a stone that is thrown straight up reaches the top of its path and then falls downward, its acceleration is

While driving down the highway a lovebug spatters onto your windshield. Which undergoes the greater impulse?

A ball rests in the middle of a cart. When you quickly jerk the cart forward, the ball

The density of a submarine cruising beneath the ocean surface has the same density as

The buoyant force that acts on a 10-ton ship floating in the ocean is

If one of the caissons of the Falkirk Wheel contained a sunken boat, resting on its bottom, and the other carried a floating boat, the wheel balance would