Final Examination Reviewer Grade 9

What kind of magnet is a nail?

• a permanent magnet

• a temporary magnet

• it is non magnetic

• a hard magnetic material

An example of a natural permanent magnet is called:

• iron

• nickel

• cobalt

• lodestone

Man made magnets are also known as (a)   magnets.

Temporary magnets acts as magnets only when they are within a strong magnetic field.

• Yes

• No

Water stored in a dam possesses

• (a) no energy

• (b) electrical energy

• (c) kinetic energy

• (d) potential energy

The rock in the picture is pushed over the edge and it begins to fall. Which type of energy conversion is taking place?

• mechanical to heat

• sound to mechanical

• potential to kinetic

• kinetic to potential

The work done on an object does not depend upon the

• (a) displacement

• (b) force applied

• (c) angle between force and displacement

• (d) initial velocity of the object

Gravitational potential energy depends on the ________ and ________ of the object. 

• Height and mass
• Friction and movement
• Mass and Movement
• Height and Friction 

As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy? 

• Both the potential energy and kinetic energy decrease
• The potential energy decreases while the kinetic energy increases 
• The kinetic energy decreases while the potential energy increases 
• Bothe the potential energy and kinetic energy increase 

At which point is kinetic energy greatest? 

• W
• X
• Y
• Z