Science Simple Machines

A simple machine is a device that helps to reduce the amount of _____ required to work.

• force
• energy
• work

____ is done when a force is applied over a distance.

• energy
• work
• force

Which of the following does a simple machine do?

• reduce the amount of work needed to do work
• reduce the amount of force needed to do work
• Both of the above

Consists of two or more simple machines.

• multiple machine
• compound machine
• duplex machine

Which of the following is NOT an example of a compound machine?

• scissors
• fishing pole
• ramp

A _____ is a fixed bar  that us free to move around a fixed point known as a fulcrum.

• pulley
• inclined plane
• lever

A lever is designed to:

• reduce the amount of force required to do work
• increase the amount of effort required
• increase the amount of energy needed to work

A ______ is a grooved wheel with a rope running along the groove.

• lever
• pulley
• screw

A _______ pulley is used to reduce the amount of effort force.

• movable
• fixed
• single

A _____ pulley only changes the direction of the force.

• movable
• fixed
• alternate