HardPhysicsintegration
+4 / -1
Using integration, the work done by a variable force F = kx from x=0 to x=d is:
A
kd²/2
B
kd
C
2kd
D
kd²
Explanation
Work done by variable force requires integration: W = ∫F·dx. For F = kx (spring force): W = ∫₀ᵈ kx dx = k[x²/2]₀ᵈ = kd²/2.
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