Question 1042765
Force Vector
F = -4i + 20j
F = < -4, 20 >



Displacement Vector
D = < Qx - Px, Qy - Py >
D = < 25-10, 5-0 >
D = < 15, 5 >



Work Done
W = F dot D
W = < -4,20 > dot < 15,5 >
W = -4*15 + 20*5
W = -60 + 100
W = 40


Note: if the force is in newtons and the displacement is in meters, then the work done is in joules.