Work Power Simple Machines

The unit used to measure work is the 

• Watt
• Newton
• Joule
• meter

Tags

NGSS.MS-PS3-4

A ______________ is a rope or chain wrapped around a wheel. 

• wedge 
• lever 
• pulley 
• screw

Any device that makes work easier is called a ______________________.

• Joule 
• prop
• lever
• machine

A force exerted over a distance to move an object is ______________________.

• power
• work
• momentum
• Watt

The efficiency of a machine can be increased by reducing __________________________. 

• effort
• resistance friction
• fulcrum
• friction

Tags

NGSS.MS-ETS1-1

The unit used to measure power is the 

• Watt
• Newton
• Joule
• Newton*meter

A simple machine with a straight slanted surface is a(n) __________________. 

• lever
• wheel and axle
• inclined plane
• pulley

Which of the following is the best example of work being done.

• doing homework

• lifting a box

• pushing a stationary box

• holding a box

No machine in existence has 100% efficiency due to ____________________.

• magic
• friction
• smoke
• input

Tags

NGSS.MS-PS3-5

A drill bit is an example of which machine?

• screw
• pulley
• ramp
• wedge