MECHANICAL: Practice Work & Energy calculations

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

• 200 J

• 20.0 J

• 100 J

• 10 J

Tags

NGSS.HS-PS3-1

Two factors that determine work are

• size of the force, and distance
• size of the force, and type of force
• mass, and distance

units for work are

• netwons
• joules
• meters
• seconds

if you push a cart with a force of 60 N for 2 m... how much work have you done?

• 120 J

• 30 J

• 120 N

• 30 N

Work done = Force x __?__

• a. distance

• b. acceleration

• c. velocity

• d. speed

If you do 40 joules of work lifting a 10N box, how high is the shelf you move it to.

• 400m

• 40m

• 50m

• 4m

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 J

• 6.0 J

• 21 J

• 27 J

I do 132 Joules of work on a bookcase. If I apply a force of 6 Newtons, how far have I moved the bookcase?

• 22 meters

• 792 meters

• 17 meters

• 320 meters

Calculate the work needed to raise a 3 kg cat up to a height of 4 m. (g = 10ms^-2)

• 12 J

• 0 J

• 120 J

• 1.22 J

Tags

NGSS.HS-PS2-4

Sue lowers a stack of books with a mass of 20 kg over a distance of 2 meters. Calculate work. (g = 10ms^-2)

• 400 J

• -40 J

• -400 J

• -20 J