According to Hooke's law:
Correct answer: A. F=-kx
- A. F=-kx
- B. F=lx
- C. F=k/x
- D. F=k/x^2
Explanation
Hooke's law states that the restoring force (F) exerted by a spring is directly proportional to the displacement (x) from its equilibrium position. The proportionality constant is the spring constant (k). Mathematically, this is represented as:F = -kxThe negative sign indicates that the restoring force is always directed opposite to the displacement.
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About Simple Harmonic Motion
Simple harmonic motion is oscillation in which acceleration is directly proportional to displacement and directed toward the equilibrium position. Work includes displacement, velocity, acceleration, phase, period, frequency, amplitude and energy, with applications to springs and simple pendulums. The restoring force and the conditions for SHM distinguish it from general periodic motion.
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