Work and Power

The unit used to measure work is the 

• Watt
• Newton
• Joule
• meter

Any device that makes work easier is called a ______________________.

• Joule 
• prop
• lever
• machine

Tags

NGSS.HS-PS3-3

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

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

A drill bit is an example of which machine?

• screw
• pulley
• ramp
• wedge

A 5000N block is lifted 10 m. How much work was done?

• 50000 J
• 5000 J
• 500 J
• 50 J

Tags

NGSS.MS-PS2-2

NGSS.MS-PS3-2

Force is a _____ or _______

• simple    complex
• push     pull
• up      down
• in      out

Tags

NGSS.MS-PS2-1