Pulleys

What are two types of pulleys?

• wings, fries

• load. weight

• fixed, movable

• effort, force

How do fixed 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

What is the formula to calculate the AMA (actual mechanical advantage) of a pulley?

• AMA= height/width

• AMA= load/effort

• AMA= R/R

• AMA= the number of supporting strings

Identify the type of pulley

• fixed

• moveable

• block and tackle or pulley system

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Identify the type of pulley

• Fixed

• Moveable

• Block and Tackle or pulley system

Tags

NGSS.MS-PS2-2

Identify the type of pulley

• Block and Tackle or pulley system

• Fixed

• Moveable

The diagram shows a movable pulley system. When moving a load, this pulley system changes the —

• direction of the force.
• amount of force needed.
• pull of gravity on the load.
• overall mass of the rope.

Tags

NGSS.MS-PS2-4

What is the ideal mechanical advantage (IMA) of this pulley?

• .5

• 1

• 1.5

• 2

A load of 650 newtons is lifted with this pulley. What is the effort required to do this work?

• 300

• 325

• 600

• 650

Tags

NGSS.MS-PS2-4

An effort of 450 newtons is applied to this pulley. What is the force of the load that will be lifted?

• 450

• 600

• 750

• 900

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4