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JEE Previous Year Question

$A force (3 x^{2} + 2 x - 5) N displaces a body from x = 2 m to x = 4 m . Work done by this force is ______J$

Topic: JEE PYQ

Answer: 58. Full step-by-step solution below.

Correct answer: 58

Solution

(58) W = \int_{x_{1}}^{x_{2}} Fdx W = \int_{2}^{4} (3 x^{2} + 2 x - 5) dx W = (x^{3} + x^{2} - 5 x)_{2}^{4} W = [60 - 2] J = 58 J

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