Simple Machines Vocabulary

What do all simple machines have in common?

• They have a mechanical advantage.

• They have few or no moving parts.

• They can be used to do work.

• All of the above

When you use a simple machine to do work, ________.

• distance increases and force decreases

• distance and force both increase

• distance and force both decrease

• distance decreases and force increases

Genesis is moving a box of books into her treehouse. How will the amount of work change if she uses an inclined plane to get to the treehouse?

• The amount of work will decrease when she uses the inclined plane.

• The amount of work will not change when she uses the inclined plane.

• The amount of work will increase when she uses the inclined plane.

• The amount of work will decrease at first and then increase.

What might an inclined plane be used for?

• holding objects together

• splitting an object apart

• raising and lowering objects

• moving an object along the ground

Tags

NGSS.MS-PS2-2

Which simple machine would be most helpful for cutting fruit?

• an inclined plane

• a wedge

• a pulley

• a wheel and axle

A screw could best be used for which of the following tasks?

• moving clothes on a clothesline

• holding two pieces of wood together

• moving rocks from one end of your driveway to another

• cutting carrots and celery

Which of the following is an example of a lever being used to do work?

• A woman uses a crowbar, a stick that can be moved back and forth to raise the lid on a box. B

• A dog finds a stick on the ground and sniffs at it but doesn’t move it.

• A woman turns a wheel to steer a car.

• A child pulls down on a rope to raise a flag.

Which of the following is an example of a wheel and axle being used to do work?

• A dog walks on four legs.

• A girl skis down a hill.

• A boy rolls down the street on roller skates.

• A bird flies from one branch to another.

Tags

NGSS.MS-PS2-2

Which of the following is an example of a pulley being used to do work?

• lowering the blinds of a window by pulling a rope attached to a wheel

• raising a person into the air by sitting on one end of a seesaw

• using your teeth to bite into an apple

• opening a door by turning a knob and pushing forward

Tags

NGSS.MS-PS3-5

Which of the following is an example of a compound machine?

• a string that can be pulled and tied to tighten shoes

• a strap on a suitcase that goes over one shoulder

• a pair of sunglasses that has two lenses

• a wheel, lever and wedge that, used together, open a can