A lot of the time, I don't know exactly where to start (at all). My instinct here was to draw a force diagram, figure out friction, do a billion different things to get Forcenet.
But actually I asked my teacher and all I needed was to draw a triangle to figure out the height for part A.
So...
Homework Statement
Starting from rest, a 5.0 kg block slides 2.5 m down a rough 30.0 degree incline in 2.0 seconds. Determine the following:
a. work down by the force of gravity
b. the mechanical energy lost due to friction
c. the work done by the normal force between the block and the...