9. Work & Energy

Which of the following best estimates the total kinetic energy of Earth's ocean currents in $J$?

A Porsche 944 Turbo has a rated engine power of 217 hp. 30% of the power is lost in the engine and the drive train, and 70% reaches the wheels. The total mass of the car and driver is 1480 kg, and two-thirds of the weight is over the drive wheels. How long does it take the Porsche to reach the maximum power output?

Which of the following examples best represents translational kinetic energy?

Which of the following is the best example of an object possessing $kinetic energy$?

Which statement best describes the relationship between $\mathrm{energy}$ and $\mathrm{work}$ in physics?

How is potential energy different from kinetic energy?

Which of the following best describes what the mechanical energy of a system includes?

Which of the following is a type of potential energy?

Which of the following does not expend energy?

For vibrational motion, which of the following best describes the total mechanical energy of a simple harmonic oscillator (such as a mass on a spring) in the absence of non-conservative forces?

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

How much work does tension do to pull the mass from the bottom of the hill (θ = 0) to the top at constant speed? To answer this question, write an expression for the work done when the mass moves through a very small distance ds while it has angle θ, replace ds with an equivalent expression involving R and dθ, then integrate.

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?

A particle moving on the x-axis experiences a force given by F_x = qx², where q is a constant. How much work is done on the particle as it moves from x = 0 to x = d?