9. Work & Energy

If the $\mathrm{Sun}$ were farther away from $\mathrm{Earth}$, how would its apparent size and brightness change as observed from $\mathrm{Earth}$?

A ball with mass $500.0 g$ is thrown straight upward with an initial velocity of $35.4 \frac{m}{s}$. Neglecting air resistance, what is the maximum height the ball reaches above its starting point?

Which of the following best describes the relationship between an object's speed and its kinetic energy?

Which of the following best describes how energy conversions make a car move down the street?

Why is energy required to get an object moving from rest?

Which energy transformation primarily occurs when using an electric pencil sharpener?

How is kinetic energy different from potential energy?

What is the ultimate source of energy for most processes on $Earth$?

In the context of a moving vehicle, the total stopping time is made up of which two main components?

If you run at a constant speed of $6m/s$ for $3$ minutes, how far (in meters) will you travel?

Which of the following is an example of potential energy?

Which of the following objects possesses $kineticenergy$?

A particle of mass $m$ starts from rest at point A at height $h$ above point B. Ignoring friction and air resistance, what is the minimum speed the particle must have at point A to just reach point B?

Which statement best compares $\mathrm{potential energy}$ and $\mathrm{kinetic energy}$?

How are $\mathrm{potential energy}$ and $\mathrm{kinetic energy}$ related in a closed system?