Simple Machines and Work Review

What is an example of a lever?

• stapler

• crowbar

• seesaw

• all of the above

Tags

NGSS.MS-ETS1-1

How can we decrease effort using a lever?

• Move the fulcrum closer to the person providing the effort

• Move the fulcrum closer to the object being moved.

• Move the fulcrum in the middle of the lever

• Move the fulcrum and the object to either end of the lever.

Tags

NGSS.MS-PS2-1

How does a pulley allow you to decrease your effort?

• Changes the weight of the object being lifted.

• Decreases the amount of applied force being applied.

• Changes the distance and direction of the force

• Increases the amount of effort force being applied.

Tags

NGSS.MS-ETS1-2

Work can be defined as

• a force exerted on an object

• a push or pull exerted on an object

• movement of an object without a force

• a force exerted on an object that causes it to move

We use simple machines to help increase the amount of ____ used, but NOT the amount of _____.

• work, force

• force, work

• force, energy

• energy, work

How can we decrease the effort needed to move a box up a ramp?

• Make the ramp shorter

• Add rubber to the bottom of the box.

• Make the ramp longer

• Pull it up instead of pushing it up.

Tags

NGSS.MS-PS2-2

How can we keep car engines from overheating?

• Use oil in engines to lessen the amount of friction

• Add gas to the car for more energy

• Use oil to help car go faster

• Use fuel that makes less pollution

Tags

NGSS.MS-PS3-3

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What is one way to decrease the amount of effort used in a wheel and axle?

• Use a larger diameter axle.

• Use a larger diameter wheel.

• Use a smaller diameter wheel.

• Use a smaller diameter axle.

Tags

NGSS.MS-PS2-1

Which of the following has a wheel and axle?

• bicycle

• wheel barrow

• pulley

• all of the above

Which of the following use pulleys to decrease their effort?

• blinds

• flagpole

• construction crane

• all of the above

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-1