Quizizz Revision - Levers and Gears

Driver Gear has 30 teeth. Driven Gear has 15 teeth. What is the Gear Ratio?

• 3 : 2

• 2 : 1

• 1 : 3

• 1 : 2

The driving gear always has less teeth than the driven gear. True or False?

• True

• False

What is an example of a lever in the real world?

• ski slope

• wheels on a car

• seesaw

• kitchen table

What best describes what a load is?

• a type of simple machine

• an example of a lever

• what you are trying to lift

• the effort

What is torque?

• a stationary force that stays still

• a twisting force that causes rotation

• a forward force

• a backward force

what is a fulcrum?

• the point on which a lever rests or is supported and on which it pivots.

• A thing

• supporter

What image represents a I class lever?

• 
• 
• 

What image represents a II class lever?

• 
• 
• 

what image represents a III class lever?

• 
• 
• 

what does a smaller cog on a bicycle gear do?

• when the cog at the back is smaller it takes less force to turn it it is a force multiplier.

• When the cog at the back is smaller it takes more force to turn it , it is not a force multiplier.

• When the cog at the back is smaller it doesn't do anything.