Levers

An example of a lever is a ...

• pulley
• bicycle 
• scissors 
• screw 

For a lever to be a first class lever the fulcrum needs to be ..

• between the load and the effort
• on one side and the load and effort on the other side 
• on the same side as the load arm. 

A good example of a second class lever is the ...

• Can-opener
• Wheelbarrow 
• hammer 
• tongs 

A lever is used to raised a 12 kilograms mass with a effort that is only 4 kilograms. What is the mechanical advantage ? 

• 12
• 4
• 3
• 32

A lever is used to raised a 12 kilograms mass with a effort that is only 4 kilograms. What is the mechanical advantage ? 

• 12
• 4
• 3
• 32

Third class levers are said to be speed multipliers. 
examples of third class levers include all of the below except .....

• a door handle 
• baseball bat 
• tennis racket 
• golf club 

Third class levers give a speed advantage because they...

• the move a load through a large distance than the effort moves the same time 
• Moves an effort a further distance than the load 
• allow you to catch a fish quickly before you applied so much effort
• allow you to pick up a heavy load quickly 

When you kick a ball the fulcrum is your ..

• foot
• ball 
• leg 
• knee

Tags

NGSS.MS-PS2-1

Simple machines (crow bar, ramp, axe, screw, crane) do which of the following?

• Reduce the mass of an object that needs to be moved
• Reduce the distance an object needs to be moved
• Reduce the amount of time needed to move an object over a distance
• Reduce the force needed to move an object over a distance

What type of simple machines does the photo show?

• Lever and wedge
• Inclined Plane and lever
• Pulley and wedge
• Lever and screw