Forms of energy

Jack placed two iron balls, A and B of mass 5 kg and 10 kg respectively on two separate tables, the tables are of the same size and height. She placed another two iron balls, C and D of mass 10kg and 5kg respectively under each table

Which ball possesses the greatest potential energy?

• A

• B

• C

• D

A marble which is rolled on a table came to a stop at the edge of the table. Which of the following statements about the marble is correct?

• The gravitational potential energy of the marble increased gradually

• The marble used up all of the potential energy

• the marble stopped rolling due to kinetic energy

• The kinetic energy had been lost as heat due to friction

Which of the following statements are true of light energy?

• The light bulb produces light and heat energy

• The sun is the only source of light energy

• Light travels in a straight line

• Light energy does not any medium to travel

Which of the following materials can release heat energy from its stored chemical potential energy?

• Fuels

• Rice

• A lighted bulb

• A falling rock

Which one of the following make(s) use of kinetic energy to produce other forms of energy?

• A windmill

• A wound up spring

• A dynamo

• Fuel

Peter constructed a pendulum by securing a rubber ball to a string and attaching it to a retort stand. He then made it swing in the diagram shown.

He then plotted a graph to show how the potential energy and kinetic energy of the pendulum changes with the height of the swinging rubber ball. Which of the following graphs correctly shows the change in the energy with respect to height?

(Dotted line:Potential energy;Straight line: Kinetic energy)

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Jake kicked a ball up the slope as shown.

Which of the following best describes the changes in potential and kinetic energy from the starting point to point B?

• Both the potential and kinetic energy increase

• Both potential and kinetic decrease

• The potential energy increases while the kinetic energy decreases

• The potential energy decreases while kinetic energy increases

What is the energy conversion when two rough surfaces are rubbed against each other?

• Potential energy --> Heat energy + sound energy

• Kinetic energy --> Sound energy + heat energy

• Potential energy --> Kinetic energy + Sound energy

• Kinetic energy --> Light energy + Sound energy

Which of the following does not match the energy conversion path?

• Option 1

• Option 2

• Option 3

• Option 4

In a solar panel, the solar cells convert __________ energy into __________ energy.

• Heat, electrical

• Electrical, light

• Light, electrical

• Light, chemical potential