Simple Machines and Mechanical Advantage/Efficiency

Simple machines make work easier by changing which two factors

• Distance and Time
• Force and Time
• Force and Distance 
• No Clue 

The input force is where 

• the effort is being applied 
• Where the work is being done 
• No idea. 
• Wherever I want it to be. 

Scissors are an example of which type of lever?

• Class 1 Levers
• Class 2 Levers
• Class 3 Levers 
• Scissors can be all three levers

The point around which a level pivots is known as the 

• Effort
• Load
• Fulcrum
• Joint

A nutcracker is an example of which type of lever?

• Class 1 Lever
• Class 2 Lever 
• Class 3 Lever 
• Class 4 Lever 

Mechanical Advantage = 

• Input Force / Output Force 
• Input Force x Output Force 
• Effort / Load 
• Output Force / Input Force 

Tags

NGSS.MS-PS2-2

The lower the Mechanical Advantage, the ___________ it is do work.

• Easier
• Harder
• Whatever. 
• I am the bomb.com

If your Mechanical Advantage is greater than 1, 

• the output force is greater than the input force.
• the input force is greater than the output force.
• there is no mechanical advantage. 
• This question is too hard.

Tags

NGSS.HS-PS2-1

To figure out the MA of an inclined plane, you would 

• divide ramp height by ramp length
• divide ramp length by ramp height
• multiply ramp height by ramp length
• add all of the numbers together. 

Mechanical Efficiency is 

• Work Output / Work Input x 100% 
• Work Output / Work Input 
• Work Input / Work Output x 100%
• Work Input / Work Output