Simple Machines and 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 

Tags

NGSS.MS-PS2-2

A force multiplier is a simple machine that multiplies your ...

• strength 
• effort 
• load 
• speed 

Tags

NGSS.MS-ETS1-2

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 rachet 
• 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

NGSS.MS-PS2-2

Effort is

• An inclined plane wrapped around a rod
• A unit used for measuring force
• How far an object moves in a certain amount of time
• The force applied to a simple machine

If the fulcrum is closer to the effort, it will take 

• more force to lift the load
• less force to lift the load
• equal force to the lift the load
• no force to life the load