Why doesn't the force of gravity change the speed of a bowling ball as it rolls along a bowling lane?

Why is it important that such a satellite be above Earth’s atmosphere?

If a space vehicle circled Earth at a distance equal to the Earth-Moon distance, how long would it take for it to make a complete orbit? In other words, what would be its period?

Can the total mechanical energy E = K + U ever be negative? Explain.

What is the shape of the orbit when the velocity of the satellite is everywhere perpendicular to the force of gravity?

Compared to a recoiling rifle, the bullet that is fired has a greater (a) momentum. (b) kinetic energy. $(c)$ both (d) neither

In the past, cars were built to be fairly rigid in collisions. Now “crumple zones” (areas designed to crumple or deform during a collision) are deliberately engineered. Why do such zones make a car safer in a collision?

Cars used to be built as rigid as possible to withstand collisions. Today, though, cars are designed to have "crumple zones" that collapse upon impact. What is the advantage of this new design?

What was the cause of perturbations discovered in the orbit of Planet Uranus? What greater discovery did this lead to?

A 5-kg fish swimming 1 m/s swallows an absent- minded 1-kg fish swimming toward it at a velocity that brings both fish to a halt immediately after lunch. Show that the speed of the smaller fish before lunch was 5 m/s.

Mary exerts an upward force of $40 \mathrm{~N}$ to hold a bag of groceries. Explain the "reaction" force (Newton's third law) by stating its direction.

Mary exerts an upward force of $40 \mathrm{~N}$ to hold a bag of groceries. Explain the "reaction" force (Newton's third law) by stating its magnitude.

Pretend you fall into a hole bored completely through the Earth. Discounting friction and rotational effects, rank from greatest to least positions A, B, C, and D for your a. speed. b. acceleration toward Earth's center.

The planet Jupiter is about 300 times as massive as Earth, but an object on its surface would weigh only 2.5 times as much as it would on Earth. Can you come up with an explanation?