Question
A 25 kg box is dragged across a floor by a rope that makes an angle of 60 degrees with the horizontal. The tension in the rope is 100 N while the box is dragged 15 m.
A) how much work is done by tension?
B) how much work is done by gravity?
A) how much work is done by tension?
B) how much work is done by gravity?
Answers
Damon
horizontal rope force= 100 cos 60
= 50 N
so
a) work done by tension = 50*15
= 750 Joules
b) NONE !!!! there is no vertical displacement !
= 50 N
so
a) work done by tension = 50*15
= 750 Joules
b) NONE !!!! there is no vertical displacement !