Simple Machines

Front

What is NOT one of the things a machine can do? Options: Changes the amount of force required, Changes the distance over which the force is exerted, Changes the direction of the force, Changes the amount of work done.

Back

Changes the amount of work done.

Front

The fixed point around which a lever rotates is known as the

Back

fulcrum.

Front

Which of the following is NOT an example of the simple machine known as a screw?

• lid of a jar
• turning on and off a faucet
• a drill bit
• a screw driver

Back

a screw driver

Front

How can simple machines make work easier?

Back

by decreasing the force needed to complete the task

Front

Which simple machine would be the MOST efficient for lifting an object 30 meters off the ground? Options: pulley, screw, wedge, lever

Back

pulley

Front

Which machine could be considered to be a type of inclined plane? Options: wheel and axle, lever, screw, pulley

Back

screw

Front

A doorknob is a simple machine made up of 2 circular objects of different sizes. When turning a doorknob, what type of simple machine is being used?

Back

wheel and axle

Front

Why do workers use an inclined plane to push a heavy box onto a moving truck?

Back

It makes their work easier because it requires less effort.

Front

Which simple machine would be the best to help workers lower a piano from a window? Options: wheel and axle, inclined plane, pulley, wedge.

Back

pulley

Front

A roof composed of 2 attached inclined planes is considered which type of simple machine? Options: wedge, screw, ramp, lever.

Back

wedge