Work and Simple Machines

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

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

• doing homework

• lifting a box

• pushing a stationary box

• holding a box

A 500N block is lifted 10 m. How much work was done?

• 50000 J

• 5000 J

• 500 J

• 50 J

Tags

NGSS.HS-PS3-2

The amount of work done in a certain amount of time is known as 

• work
• effort force
• resistance force 
• power

What is the power of a tractor that drags a plow with 5,000 J of work in 20 seconds?

• 250 Watts

• 250 Joules

• 100,000 Watts

• 100,000 Joules

The unit used to measure power is the 

• Watt
• Newton
• Joule
• Newton*meter

d = 10 m

F = 12.5 N

W = ____

• 125 J

• 1250 J

• 1.25 J

• 0.8 J

W = 5000 J

t = 200 s

P = ____

• 0.04 W

• 25 W

• 1,000,000 W

• 125 W