Asked by Anonymous
An 7.5 crate is pulled 5.4 up a 30 degree incline by a rope angled 19 degrees above the incline. The tension in the rope is 130N and the crate's coefficient of kinetic friction on the incline is 0.24.
How much work is done by tension? by gravity? by the normal force?
How much work is done by tension? by gravity? by the normal force?
Answers
Answered by
drwls
<<How much work is done by tension?>>
(tension component up incline)*(distance)
<< by gravity?>>
-(vertical rise)*(weight)
<<by the normal force?>>
zero, because it is perpendicular to the motion
Your 7.5 and 5.4 numbers require dimensions. Surely you have learned that by now.
(tension component up incline)*(distance)
<< by gravity?>>
-(vertical rise)*(weight)
<<by the normal force?>>
zero, because it is perpendicular to the motion
Your 7.5 and 5.4 numbers require dimensions. Surely you have learned that by now.