a box of mass 16kg is pulled from rest a distance of 5m across a smooth horizontal floor by a cable inclined at 60degree to the horizontal.find the work done by the tension in the cable given that its magnitude is 25N.

Question

anonymous · Answer

Only the portion of the force that is parallel to the floor does work. 

To find this, we use trig. $$F_x = T \cos(\theta)$$

Work is expressed as force times distance. $$W = F_x \Delta x$$

anonymous · Answer

is it we've to ignore the mass given?

anonymous · Answer

yes as they gave the force already

anonymous · Answer

ok thanx ^_^