Physics 606 - Revision A

Define simple machines.

Answer explanation

Devices or tools which help to make work easier and faster to perform.

Why is maintenance of machines necessary?

Answer explanation

To ensure they work well for longer periods of time.

Define pulley.

Answer explanation

A simple machine consisting of a wheel with a grooved rim in which a rope or a chain can run.

List three ways of maintaining machines.

Answer explanation

=Keep the tools and machines covered when not in use.

=Machines should be kept at clean places away from dirt and moisture.

=Regular oiling or greasing of the parts

The two important terms associated with a screw are....

Answer explanation

Lead, Pitch

Examples of wedges include:

Answer explanation

Axe, Hammer, Knife, Razor

A fixed pulley increases the size of the force.

• True

• False

A class III lever acts like a distance multiplier.

• True

• False

Inserting a screw takes less effort than inserting a nail.

• True

• False

Machines can be simple or complex.

• True

• False