Physics Quiz

The diagram below represents a cyclist at the top of a hill, with four points labeled W, X, Y, and Z. Assume that the cyclist does not apply the brakes as he rides down the hill. At which point is the cyclist’s kinetic energy the greatest?

• point W

• point X

• point Y

• point Z

If an object's TOTAL (mechanical) energy remains the same, while its kinetic energy increases, what is happening to the object's potential energy?

• it remains the same

• it increases

• it decreases

• it is destroyed

The Law of Conservation of Energy states that energy can neither be created or destroyed, but it can be transferred. Which claim best represents this law?

• This is true all of the time.

• This is true for only half of all energy conversions.

• This is never true because energy is always lost due to friction.

• This is only true on even numbered days.

Where would a girl have the GREATEST amount of gravitational potential energy on a playground?

• sitting at the bottom of the slide

• halfway up a slide’s ladder

• standing on the ground

• at the top of the slide waiting to come down

What is the kinetic energy of a 30 kg cheetah that is running at a speed of 17 m/s?

• 255 J

• 510 J

• 4,335 J

• 8,670 J

Using the chart above, which object has the greatest gravitational potential energy (GPE)?

• book

• plate

• framed picture

• statue

Which energy transformation represents light energy changing to chemical energy?

• 1

• 2

• 3

• 4

This flashlight uses three different forms of energy. Which of these below shows the energy transformations in the correct order?

• A. chemical → electrical → light

• B. thermal → chemical → light

• C. mechanical → thermal → chemical

• D. electrical → mechanical → chemical

At which point on the roller coaster will the potential energy be the greatest?

• A. point W

• B. point X

• C. point Y

• D. point Z

Which set of energy values for the roller coaster below makes the most sense according to the Law of Conservation of Energy?

• At point A all of the energy is potential. At point C all of the energy is kinetic. At point B, there is slightly more potential energy than kinetic energy.

• At point A all of the energy is potential. At point C all of the energy is kinetic. At point B, there is slightly more kinetic energy than potential energy.

• At point A all of the energy is kinetic. At point C all of the energy is potential. At point B, there is slightly more kinetic energy than potential energy.

• At point A all of the energy is kinetic. At point C all of the energy is potential. At point B, there is slightly more potential energy than kinetic energy.