Inclined Planes Pulleys Lesson

What does this image represent?

• A pulley

• A wedge

• A lever

• A wheel and axle

Tags

NGSS.MS-PS2-2

What is the formula to calculate the MA (mechanical advantage) ?

• MA= height/width

• MA= load/effort

• MA= R/R

• MA= output force/input force

Tags

NGSS.MS-PS2-2

Wells use a pulley system to:

• hoist the bucket

• provide water

• drop items

• nourish water

Tags

NGSS.MS-PS2-2

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.

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

Identify the type of pulley

• Block and Tackle or pulley system

• Fixed

• Moveable

Tags

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. What is the input force required to do this work?

• 300

• 325

• 600

• 650

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2