What Is Work

It takes 20 N of force to move a box a distance of 10 m. How much work is done on the box ?

• 200 J
• 20.0J
• 2 J
• 200 N

Two factors that determine work are

• amount of the force, and effort used
• amount of the force, and type of force
• mass, and distance
• amount of force and distance moved

You apply a force of 18 N to a dresser and move it 3.0 m. How much work did you do on the dresser?

• 54 N
• 6.0 J
• 54 J
• 27 J

Tags

NGSS.MS-PS3-5

In which of the following situations do your arms do work on books?

• holding a heavy stack of books while standing
• carrying a heavy stack of books
• dropping a stack of books onto a table
• picking up a pile of books from the floor

The unit or label for work is

• netwons
• joules
• meters
• seconds

Ms. McDonald holds a desk perfectly still above her head. If she holds the desk at a height of 0.5 meters above her head, and applis 68 Newtons of force to do so, how much work has she done?

• 34 Joules
• 0 Joules
• 68 Joules
• 340 Joules

 Work done = Force x blank?

• a. distance
• b. acceleration
• c. velocity
• d. speed

Tags

NGSS.HS-PS3-1

True or false
You do work only when you exert a force on an object and move it

• true
• false

units of force are

• netwons
• grams
• joules
• meters

What is the formula for work?

• output work/input work X 100%
• work/time
• input force/output force
• force X distance

Tags

NGSS.MS-PS3-5