1. The problem statement, all variables and given/known data A force of 4.7 N acts on a 17 kg body initially at rest. Compute the work done by the force in (a) the first, (b) the second, and (c) the third seconds and (d) the instantaneous power due to the force at the end of the third second. 2. Relevant equations f= ma p=fv d= vit + 1/2 at^2 vf= vi + at 3. The attempt at a solution i got parts a and d.. but b and c seem to be the problem first, i used f= ma to get the acceleration then i plugged it in to d= 1/2at^2 to find d, and i got it then i did work = fd and found the work that was part a, and it was correct for parts b and c.. i tried to use vf = vi + at i think the problem is that i was assuming that vi is 0, but i don't know how else to do it and for d, i just took the velocity that i found in part c, (even though the answer i got for c was wrong) and did p = fxv to get the power and it was also correct please help, this homework is due tonight and i'm pretty confused!