2. Which of the following has kinetic energy?
a) A lighted bulb
b) A dry cell for a torch light
c) A bowl of rice
d) The rotating blade of an electric fan

3. Which of the following statements about energy is NOT true?
a) Energy can be created and can also be destroyed.
b) Energy is the ability to do work.
c) Energy can be transformed from one form to another.
d) Energy can be conserved.

4. A little boy is playing with a toy car on a table. He pushes it too hard and it falls over the edge. Just before it hits the floor, the car's
a) kinetic energy is greatest.
b) potential energy is greatest.
c) kinetic and potential energy have both increased.
d) kinetic energy and potential energy have both decreased.

5. Which is the odd one out in terms of energy?
a) A container which has been lifted up and placed high up on a shelf.
b) A stationary rock which has been pushed to the top of a hill.
c) A watch-spring which has been fully wound up.
d) A leaf which is falling from a tree and is about to touch the ground.

6. A solar cell is used to run a motor. Which of the following best shows the energy changes involved?
a) Light energy ------> Electrical energy ------> Potential energy
b) Light energy ------> Electrical energy ------> Kinetic energy
c) Light energy ------> Heat energy ------> Electrical energy
d) Heat energy ------> Light energy ------> Electrical energy

7. Which of these energy changes is INCORRECT?
a) In a photoelectric cell, light energy is converted to electrical energy.
b) In a battery, chemical energy is converted to electrical energy.
c) In a bomb exploding converts chemical energy to heat, light and sound energy.
d) In a pile-driver, kinetic energy is converted to potential energy.

8. Which of these energy changes about an athlete starts to throw a javelin and landed on a ground is CORRECT?
a) Potential energy -----> Kinetic energy -----> Heat energy -----> Sound energy
b) Kinetic energy -----> Potential energy -----> Chemical energy -----> Sound energy
c) Chemical energy -----> Potential energy -----> Kinetic energy -----> Sound energy
d) Chemical energy -----> Kinetic energy -----> Potential energy -----> Heat energy

9. The bob of a simple pendulum swings between points P and R as shown in the diagram.

The bob has maximum kinetic energy
a) at point P
b) at point Q
c) at point R
d) between P and Q

10. Which of the following statements about the various sources of energy is TRUE?
a) Solar energy is the most environment-friendly form of energy.
b) Fossil fuels are the main source of energy in the world.
c) Geothermal energy is obtained from the decay of plants and animals.
d) Hydroelectric energy makes use of the chemical energy to produce electricity

----------Answer----------

1. (b)
2. (d)
3. (a)
4. (a)
5. (d)
6. (b)
7. (d)
8. ©
9. (b)
10. (a)