Emma's Pulleys & Gears Test

A simple machine that uses a grooved wheel and rope to lift, lower, or move a load.

What is a pulley?

A pulley system

What is it called when you have 2+ pulleys combined together?

A flagpole, a crane

What is an example of a pulley in real life?

Makes it easier to lift something.

What is mechanical advantage?

Photo below.

Label the load, motion, and effort of the pulley (point to it on the screen and say it out loud).

Pull

Does a pulley system help us push or pull?

A fixed pulley stays in 1 spot and is attached to a structure. As the rope is pulled down, the load moves up.

What is a fixed pulley?

A moveable pulley is a pulley that can change position relative to the structure (wheel is not attached to something).

What is a moveable pulley?

The moveable pulley makes movement easier because as the load is being pulled up, the rope is being pulled in the same direction.

How does a moveable pulley make movement easier?

A toothed wheel that moves with another toothed mechanism to change the speed or direction of motion.

What is a gear?

A watch, a bike

What is an example of a gear in real life?

A gear train

What is it called when you have 2+ gears combined together?

Crown gear, worm gear, rack gear, pinion gear

What are the 4 types of gears?

A crown.

What does a crown gear look like?

A worm.

What does a worm gear look like?

A rack (it’s the rectangular gear in the photo, like a train track).

What does a rack gear look like?

A circular gear on top of a rack gear (like a wheel on the train track).

What does a pinion gear look like?

Motion is the action or process of moving or being moved.

What is motion?

Rotary, Linear, Reciprocating, Oscillating

What are the 4 types of motion?

Motion in a straight line.

What is linear motion?

Circular motion.

What is rotary motion?

Back and forth (opposite directions, like a rocking chair… not swinging)

What is reciprocating motion?

Swinging motion (like a swing!)

What is oscillating motion?