DCP 4 Review

The flashlight shown has no batteries. It operates by squeezing and letting go of the handle. Inside the body of the flashlight are gears. What energy transfers take place within the flashlight to produce light?

• mechanical energy → electrical energy → light energy

• mechanical energy → chemical energy → light energy

• chemical energy → mechanical energy → light energy

• chemical energy → electrical energy → light energy

A runner eats breakfast then he goes for a jog. Which of the following energy transformations occurred during the jog?

• Chemical energy to mechanical energy

• Mechanical energy to chemical energy

• Chemical energy to light energy

• Electrical energy to chemical energy

A person cuts down a living oak tree. The person burns the wood from the oak tree to boil water. Which sequence correctly orders the energy transformations that occurred from the living tree to the boiling water?

• solar energy → chemical energy → thermal energy

• thermal energy → chemical energy → light energy

• chemical energy → mechanical energy → electrical energy

• electrical energy → mechanical energy → chemical energy

Which of the sequences below best illustrates the energy transformations occurring in this toy car?

• chemical energy → mechanical energy → electrical energy

• mechanical energy → chemical energy → electrical energy

• electrical energy → chemical energy → mechanical energy

• chemical energy → electrical energy → mechanical energy

The diagram to the right show a rocket just before and after it lifts off. The rocket is powered by a fuel mixture that is contained within the rocket. Which sequence best identifies the energy transfers that take place as the rocket lifts off?

• Mechanical → light → chemical

• Chemical → mechanical → thermal

• Thermal → chemical → light

• Chemical → thermal → mechanical

A student is investigating potential and kinetic energy by stretching a spring across a table. When the student lets go, the spring recoils.

At which step is the potential energy in the spring the greatest?

• 1

• 2

• 3

• 4

The drawing above shows a diagram of the Steel Dragon 2000, a roller coaster in Japan. It is one of the longest roller coasters in the world. At which point on the roller coaster would a rider have the greatest gravitational potential energy?

• W

• X

• Y

• Z

The diagram shows four positions of a ball rolling down and off a curved ramp. At which location does the ball have the greatest kinetic energy and the least potential energy?

• 1

• 2

• 3

• 4

The diagram to the right represents a diver’s motion from the top of a high diving board into a pool of water. At what point does the diver have the greatest kinetic energy and the least potential energy?

• 1

• 2

• 3

• 4

The diagram shows two bowling balls of equal mass. Ball A is resting near the edge of a shelf. Ball B is resting on the ground below. Which of these statements best describes the diagram above?

• Ball A has more kinetic energy than Ball B.

• Ball B has more kinetic energy than Ball A.

• Ball A has more potential energy than Ball B.

• Ball B has more potential energy than Ball A.