Ah thanks. Yeah my bad it is suppose to be the integral with respect to position.
I see why that doesn't work now.
I found the better way to do this was to use
W = K_f - K_i
and that got me to where I wanted to go. Thanks for the help.
Homework Statement
A force acts on a 2.80 kg particle in such a way that the position of the particle as a function of time is given by x = (3.0 m/s)t - (4.0 m/s^2)t^2 + (1.0 m/s^3)t^3. Find the work done by the force during the first 4.0s.
Homework Equations
W = \int_{t_i}^{t_f} F(t) dt
F...