9. Work & Energy

How are $K$ (kinetic energy) and $U$ (potential energy) related in a closed system?

Which type of energy is considered stored energy?

Which of the following is an advantage of a laser measuring tool compared to traditional measuring tapes?

Which of the following is an example of potential energy?

Which of the following is an example of potential energy?

In sports, where does the $kinetic energy$ that people use to move primarily originate?

A car of mass $m$ moves with speed $v$ at the top of a vertical loop. What is the kinetic energy $K$ of the car at the top of the loop?

Which of the following is the correct equation for the gravitational potential energy of an object near Earth's surface?

Water stored behind a dam is an example of what type of energy?

In the context of kinetic energy ($E=\frac{1}{2}m{v}^2$) and stopping a moving object, what is the key factor to achieving a smooth stop?

When is an object's $KE$ at its maximum?

A $2\mathrm{kg}$ object is held at a height of $5m$ above the ground. If the acceleration due to gravity is $g=9.8m/s^2$, how much gravitational potential energy does the object have relative to the ground?

Which of the following is an example of $kinetic energy$?

Which of the following statements is true about a car moving with constant $v$?

When you pull a child in a wagon across a level surface, is work done on the wagon by the force you apply?$W=Fda0cos8$