Lever and Pulleys

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

Identify the type of pulley

• fixed

• moveable

• block and tackle or pulley system

Identify the type of pulley

• Fixed

• Moveable

• Block and Tackle or pulley system

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

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

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

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

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. If there was no friction, how much force should be needed to lift the weight?

• 300

• 325

• 600

• 650

Tags

NGSS.MS-PS2-2

An input force of 450 newtons is applied to this pulley. If there was no friction, how much weight should it be able to lift?

• 450

• 600

• 750

• 900

Tags

NGSS.MS-PS2-2

What is the ideal mechanical advantage of this pulley?

• 1

• 2

• 3

• 4

If there is no friction, how much force would be required to lift an output force of 170 newtons using this pulley system?

• 57

• 114

• 85

• 90

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is the ideal mechanical advantage of this pulley system?

• 4

• 5

• 6

• 7

Tags

NGSS.HS-ETS1-2