A 12 kg brick moves along an x axis. Its acceleration as a function of its position is shown in Fig. 7-37. What is the net work performed on the brick by the force causing the acceleration as the brick moves from x = 0 to x = 5.2 m?
W=integral from xo to x Fxdx + integral yo to y Fydy....
The Attempt at a Solution
Since acceleration isn't constant we can't use W=Fd, so:
Statement of known values:
xo= 0 m
a(5.2)=13 ms-2 (from the graph.. determined by 4m/10ms-2=5.2m/x)
Unknown/want to find:
So using the integral formula (can we assume it's only moving in the x direction?)
I'm at a loss though, in the example done in class, he broke the forces up in to components, but I can't really do that here since acceleration isn't constant and force is what i'm solving for...