Gears and Levers

How are large gears different from small gears?

• no difference, they are the same

• small gears turn with more force than large gears

• large gears turn with more force than small gears

• large gears have fewer teeth than small gears

Tags

NGSS.MS-ETS1-2

What is torque?

• a stationary force that stays still

• a twisting force that causes rotation

• a forward force

• a backward force

Which tool would require torque to operate?

• hammer

• screwdriver

• pliers

• scissors

Which is true of a 1:3 ratio?

• a large gear must turn 3 times to make a small gear turn 1 time

• a small gear has to turn 4 times to make the large gear turn 1 time

• a large gear has to turn 4 times to make the small gear turn 1 time

• a small gear has to turn 3 times to make the large gear turn 1 time

Which best describes the relationship between a small gear with 8 teeth and a large gear with 40 teeth?

• 1:5 ratio

• 1:40 ratio

• 1:8 ratio

• 1:1 ratio

What is a fulcrum?

• the board you use for the lever

• the point at which a lever pivots

• the top of the lever

• the board

When discussing simple machines, what is effort?

• a type of simple machine

• the force you apply to move an object

• what the simple machine is lifting

• the point where the lever pivots

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

Which statement is true?

• As you increase distance, your effort must increase.

• As you increase distance, your effort can decrease.

• As you decrease distance, your effort must decrease.

• Effort and distance always stay the same, no matter what you do.