Work and Simple Machines Review

Which simple machine is thick at one end and tapers to a sharper edge at the other end?

• wheel and axle
• pulley
• wedge
• lever

a grooved wheel with a rope wrapped around it

• inclined plane
• lever
• pulley
• wheel and axle

What is work?

• a force exerted on an object
• movement of an object without a force
• a push or pull exerted on an object
• a force exerted on an object that causes it to move

A simple machine ___________.

• makes work harder
• makes work easier
• reduces the amount of work
• increases the amount of work

Which position would be the best position for the fulcrum to decrease the effort needed to lift the weight?

• 1
• 2
• 3
• 4

If you wanted to lift a heavy box using a lever, then you should ___________.

• move the fulcrum closer to you
• move the fulcrum closer tot the box
• move the fulcrum to the middle
• move the box as far as possible from the fulcrum

Which inclined plane would require the least amount of effort force?

• A
• B
• C
• D

A ____________ is made of rigid bar and a fulcrum.

• lever
• screw
• pulley
• wheel and axle

an inclined plane wrapped around a cyclinder

• pulley
• screw
• wheel and axle
• lever

What unit is used to measure force?

• Joules
• Newtons
• meters
• m/s