9. Work & Energy

A ball starts from rest at the top of a hill and rolls down without friction. Which form of energy increases as the ball moves down the hill?

Which of the following is NOT an example of an energy transformation?

Which of the following best describes how $E\_\mathrm{electrical}$ energy can be produced from $E\_\mathrm{potential}$ and $E\_\mathrm{kinetic}$ energy?

In the context of energy types, is sound energy considered $\mathrm{potential}$ or $\mathrm{kinetic}$ energy?

Which of the following best describes the difference between $\mathrm{potential}\mathrm{energy}$ and $\mathrm{kinetic}\mathrm{energy}$?

Why do some mountain ranges experience the rain shadow effect in terms of energy $E$ and kinetic energy $\mathrm{KE}$?

Why is making rough estimates of physical quantities, such as $kinetic energy$, useful in physics?

If $320$ joules of work are done by a force of $80$ newtons, over what distance was the force applied?

When a skydiver first jumps from a plane, which energy transformation primarily occurs?

A skier is gliding down a slope at a constant speed. What energy transformation is primarily taking place during this motion?

Which statement best describes the relationship between sound and energy?

As an object in motion becomes heavier, its kinetic energy $K$ _____.

In classical mechanics, does there always exist a reference frame in which the total kinetic energy of a system of particles is zero ($K=0$)?

Which of the following is an example of $\mathrm{work}$ being done on an object?

A frictionless roller coaster car of mass $m$ starts from rest at a height $h$ above the ground. What is the speed of the car when it reaches the bottom of the track, assuming no energy is lost to friction or air resistance?