Gears and Levers

What is a gear?

• A gear is a wheel with a grove on its edge.

• A gear is a wheel with teeth on its edge.

• A gear is a wheel which is heart shaped

• All of the above

True or False: Gears next to each other turn in the same direction.

• True
• False

The purpose of the IDLER GEAR is to ____________.

• change the speed of rotation
• make the model harder to build
• add more gears for fun
• change the direction of rotation

To INCREASE speed of rotation, you can ____________________.

• add more gears
• change from a LARGE gear to a SMALL gear
• turn the handle less times
• change from a SMALL gear to a LARGE gear

Scissors are an example of a

• class 1

• class 2

• class 3

Nutcracker is an example of

• class 1

• class 2

• class 3

Tweezers are an example of

• class 1

• class 2

• class 3

How do you measure effort?

• Newtons

• Meters

• Inches

What do class 2 levers have in the middle?

• Effort

• Load

• Fulcrum

The place where a lever pivots is called the _______.

• Pivot point

• Effort

• Fulcrum

• Load