Answer:
W = 0 J
Explanation:
Formula for work done is;
W = F × d
Where;
W is work done
F is Force
d is distance covered
What this means is that we will calculate the area under which the given times in the graph pass.
Thus;
At constant force of F = 40 N which falls in between distance of 0 m and 2m,
W1 = 40 × 2 = 80 J
At constant force of -20 n which will fall between distance of 2 m and 6 m which is 4m, we have;
W2 = -20 × 4
W2 = -80 J
Thus, total workdone is;
W = W1 + W2
W = 80 - 80
W = 0 J
