Question

Which of the following is not an example of work?

A. raising a barbell over your head

B. picking up a box off the floor

C. holding a tray in the cafeteria line

D. pushing a box across the floor

Answer 1

when a force displaces an object it does work. So which of those things is not being displaced?

Answer 2

d?

Answer 3

does a box move when you push it?

Answer 4

yes

Answer 5

ok so then you are displacing it from its original position. you apply a force and it moves the box, so you are doing work.

Answer 6

ohhhhhhhhhhh

Answer 7

i get it!!

Answer 8

so it has to be c then

Answer 9

if you lift something up you are also doing work, you displace it from the ground to wherever it ends up. so you have done work.

Answer 10

but if you just hold something in one spot, you are not displacing it. so I think it should be obvious which one is not being displaced!