Simple Machines and Ima

What is a simple machine?

• a device that has only one working motor
• a device that makes work easier
• a device that makes more work for a job
• device that is made up of two or more machines

What is the ability to do work the definition for?

• work
• energy
• force
• strength

What is the equation for calculating work? 

• force times distance 
• force divided by distance 
• force plus distance 
• mass times acceleration 

Two inclined planes placed back to back forms this simple machine 

• pulley
• wedge
• lever
• wheel and axle 

A flat sloping surface that connects lower and higher elevations. It makes raising objects easier.  

• wedge
• screw
• lever
• inclined plane 

Tags

NGSS.MS-PS2-2

A simple machine that consists a rigid bar that pivot about a fixed point

• lever
• pulley
• wheel and axle
• fulcrum 

point on which a lever rests and on which it pivots

• screw
• wheel and axle
• see saw 
• fulcrum 

A simple machine that consists of two circular objects of different sizes that rotate around a axle 

• wheel and axle
• pulley
• screw
• fulcrum 

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A fishing pole is an example of a compound machine. What simple machines are used to make up this compound machine?

• lever, wheel and axle, pulley

• wheel and axle, inclined plane, pulley

• wheel and axle, wedge, inclined plane

Flagpole

• wedge
• pulley
• incline plane
• wheel and axle

Tags

NGSS.MS-PS2-1