Simple Machines

What is a simple machine?

• A tool which makes use of a single force to do work easily.

• A machine that makes our work difficult for us.

• A tool which is not useful for us.

• A machine that takes a long time to complete work.

A nut cracker is an example of a _____________.

• Pulley

• Lever

• Gears

• Wheel & axle

A lever is _________________________.

• A type of machine that opens bottles.

• A ramp use to lift and lower objects.

• A tool to help pump water.

• A board or a bar that turns about a fixed point.

What is an example of a type of lever?

• Ramp

• Skateboard

• Scissors

• Door knob

Levers, Inclined Planes, Pulleys, Gears and Wheel and axle are types of _________________.

• Complex machines

• Tools

• Simple machines

• Metal machines

A pulley uses a ________________________.

• Inclined plane, rope and a lever.

• Wheel with a rope or chain running through it.

• Screw, wedge and an inclined plane.

• Wheel and axle

An inclined plane is a ramp used to ____________________.

• Pull or push objects

• Remove and clean objects

• Lift and lower objects

• Take photographs of objects

How do gears make work easier?

• Gears can be used to make things move slower.

• Gears can be used to make things move faster or with more force.

• Gears can be used to lift a heavy object.

• Gears can be used to move a heavy object.

Which of the following is an example of a wheel and axle?

• A staircase

• A claw hammer

• A mechanical watch

• A door knob

How does an inclined plane make work easier?

• To move an object to a higher or a lower place.

• To push and pull an object.

• To stretch an object.

• To turn an object.