Force and Motion & Simple Machines Review

When people walk on the Moon, they found that they could jump higher than they could back on Earth. Why is this true?

• There is no atmosphere on the Moon

• The Moon has less gravitational force than Earth

• Space suits helped them jump higher

• THe Moon rotates faster than Earth does

Stairs

• wedge
• pulley
• inclined plane
• wheel and axle

Tags

NGSS.MS-ETS1-1

Lightbulb

• wedge
• pulley
• incline plane
• screw

What type of simple machine is this?

• wheel and axle
• gear
• lever
• inclined plane

Which of the following does a simple machine do?

• allows the users to apply less force over a longer distance
• reduce the amount of force needed to do work
• change the direction of the applied force
• all of the above

Two examples of a pulley...

• knife & axe blade
• lightbulb & screw
• flagpole hoist & window blinds
• catapult & teeter totter

Which is an example of someone using a simple machine to do work?

• a boy runs across a football field
• a banker counts money
• a mother pushes a stroller up a ramp
• a girl eats a sandwich

What is an example of an inclined plane?

• crane
• slide
• bike
• see-saw

What is a screw?

• means attracted to a magnet
• an inclined plane that is wrapped around an axle
• stiff bar that rests on a fulcrum
• made of 2 inclined planes that are back to back

What is a lever?

• made of 2 inclined planes that are back to back
• means attracted to a magnet
• stiff bar that rests on a fulcrum
• made of 2 inclined planes that are back to back