Simple Machines

What simple machine can be used to split things apart and also it can hold open a door?

• Lever
• Pulley
• Wedge
• Screw

What simple machine holds things together?

• Wedge
• Screw
• Lever
• Pulley

This is an example of what simple machine?

• pulley
• wedge
• inclined plane
• lever

The fixed point on the lever is called 

• load
• resistance
• bar
• fulcrum

Two examples of a pulley...

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

A lever is designed to:

• reduce the amount of force required to do work
• increase the amount of effort required
• increase the amount of energy needed to work

A(n) __________ is a push or pull.

• newton
• acceleration
• force
• momentum

A painter lifts a can of paint that weighs 48 Newtons a distance of 3 meters. How would you calculate how much work he does? (work = distance x force)

• 3m ÷ 48N
• 48N ÷ 3m
• 48N × 3m
• none of the above

Which statement correctly explains a compound machine?

• A compound machine is made up of one or more simple machines
• A compound machine is made up of two or more simple machines.
• A screw is a type of inclined plane.
• None of the above

 The picture shows a student using a pulley system to raise a flag. Which statement correctly describes the function of this system? 

• The more force used to pull the string, the more string will be needed to raise the flag. 
• The more force used to pull the string, the faster the flag will move up the flagpole. 
• The less force used to pull the string, the greater the distance the flag will move. 
• The less force used to pull the string, the longer the flag will remain raised.