Question

A man pulls a 50.0 kg box with a rope parallel to the ground. He pulls the box 10.0 m. About how much work has he done?

5 J , 0.2 J , 5000J , or 500 J ?

Answer 1

$$ \rm Work = F \cos \theta ~\Delta x $$ but here theta = 0 , so the equation simplifies to

Work = Force * distance

The force here is due to weight, weight = mass * gravity

work = (50 kg * 9.8 ) * 10 meters

Answer 2

that's right! @perl

Answer 3

so 4900? so approximately 5000 J is our solution?

Answer 4

correct

Answer 5

yay!! thanks!!