Answer:
0.14 J
Explanation:
Use the force to calculate the spring constant.
F = k Δx
27 N = k (0.32 m − 0.28 m)
k = 675 N/m
Work is the change in energy:
W = PE
W = ½ k (Δx)²
W = ½ (675 N/m) (0.30 m − 0.28 m)²
W = 0.135 Nm
W = 0.135 J
Rounding to two decimal places, W = 0.14 J.
Your answer was correct, but it was in units of Ncm, and you needed to answer in units of J.
