Pulleys

What does this image represent?

• A pulley

• A wedge

• A lever

• A wheel and axle

What are two types of pulleys?

• wings, fries

• load. weight

• fixed, movable

• effort, force

Pulleys make work:

• Easier

• Rigorous

How do pulleys make work easier?

• they change the direction of a force

• they change the amount of force required

• the distance over which the force is applied

• the measurement of an object

Tags

NGSS.MS-PS2-2

The opposite of input is:

• output

• force

What is a pulley?

• a simple lifting machine consisting of a rope which unwinds from a wheel on to a cylindrical drum or shaft joined to the wheel to provide mechanical advantage.

• a rigid bar resting on a pivot, used to help move a heavy or firmly fixed load with one end when pressure is applied to the other.

• a wheel with a grooved rim around which a cord passes. It acts to change the direction of a force applied to the cord and is chiefly used (typically in combination) to raise heavy weights.

• a piece of wood, metal, or some other material having one thick end and tapering to a thin edge, that is driven between two objects or parts of an object to secure or separate them.

The part of the rope from the pulley to the effort is called an _________ ____________

• Force lever

• Center Fulcrum

• Effort Arm

The place on the pulley in which the rope lies

• groove

• spindle

• effort

One of the two kinds of pulleys

• Fixed

• Moveable

• Easy

• Groovy

What is the unit used to measure force?

• meter

• gram

• Newton

• liter