Physics Year 7 Term 2

On Hawaii beach, tourists are warned to beware of falling coconuts.

This is because while on the tree, coconut fruits have

• Strained potential energy

• Gravitational potential energy

• Internal energy

• Kinetic energy

A coconut that fall on a man’s head may cause serious injury to the head.

This is because at contact,

• Chemical energy is converted to solar

• Heat energy is converted to potential

• Gravitational potential energy is converted to kinetic

• Coconut will explode

Derrick hunts sparrows by shooting arrows at them. When he pulls the bow, which shoots the arrow towards the target.

This is possible because:

• Chemical energy is converted to solar

• Strain potential energy is converted to internal

• Gravitational potential energy is converted to kinetic

• Strain potential energy is converted to kinetic

Stored energy is also called _________

• Kinetic

• Translational

• Static

• Potential

An astronaut who travelled into the outer space needed to communicate with his team on the earth.

The energy needed for the communication is

• Gravitational potential energy

• Chemical energy

• Electromagnetic energy

• Kinetic energy

The temperature of a body increases because its

• Sound energy increases

• Internal energy increases

• Chemical energy decreases

• Light energy decreases

Which of the following is not a product of electromagnetic energy?

• Radio waves

• X – rays

• Friction

• Light

Alice could not do much work when she was hungry. But when after eating, she had lots of energy to work!

The energy gained form food is an example of

• Strain potential energy

• Sound energy

• Chemical

• Heat

“Energy can neither be created nor destroyed, but are converted from one form to another”.

This is the statement of

• Conservation of energy

• Destruction of energy

• Creation of energy

• Abnormality of energy

I.           Natural

II.                  Exhaustible

III.                Eco – friendly

Which of the points above gives the correct properties of renewable energy sources?

• A.     I & II only

• B.      II & III only

• C.      I & III only

• D.     I, II & II