JEE Main | 2014Work, Power and EnergyHard
Question
When a rubber-band is stretched by a distance x, it exerts a restoring force of magnitude F = ax + bx2 where a and b are constants. The work done in stretching the unstretched rubber-band by L is :
Options
A.aL2 + bL3
B.
(aL2 + bL3)
(aL2 + bL3)C.
D.
Solution
∫dW = ∫F. dl
W = ∫0L ax dx + ∫0Lbx2dx =
W = ∫0L ax dx + ∫0Lbx2dx =
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