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JEE Main 2014 (12 Apr, Shift 1) · Periodic Motion & SHM Basics

Periodic Motion & SHM Basics question from JEE Main 2014 (12 Apr, Shift 1)

Q65JEE Main 2014 · 12 APR · SHIFT 1Easy

Periodic Motion & SHM Basics

Which of the following expressions corresponds to simple harmonic motion along a straight line, where x is the displacement and a, b, c are positive constants?

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Answer: (d)

For SHM the force (or acceleration) must be $F = -kx$ only.
Options (a), (b), (c) have constant or $x^2$ terms.
$-bx$ is the only linear restoring expression.
So the answer is (d) $-bx$ .

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