Question is about finding force etc.?
1 Answer
May 12, 2018
the value of FN = 30 / (cos 15)
Explanation:
the work done by the force
S is the displacement vector.
we do have info that during the displacement the motion was
uniform so no net force was acting along the path .
the forces opposing the motion were friction added to the force due to gravity along the path acting downward.
the work done against the force of resistance is 900 J and the work done against gravity is 2100 J.
therefore the total work done
therefore the force