When the bob of a simple pendulum is at the extreme position and the mean position, then its kinetic energy will be
Correct answer: C. The kinetic energy is zero at the extreme position and maximum at the mean position.
- A. The kinetic energy is maximum at both positions.
- B. The kinetic energy is zero at both positions.
- C. The kinetic energy is zero at the extreme position and maximum at the mean position.
- D. The kinetic energy is maximum at the extreme position and zero at the mean position.
Explanation
When the bob of a simple pendulum is at its extreme position, it momentarily stops before changing direction, causing its kinetic energy to be zero. At the mean position, the pendulum swings through the lowest point and moves the fastest, meaning its kinetic energy is at its maximum. Therefore, the correct answer is that the kinetic energy is zero at the extreme position and maximum at the mean position. The other options are incorrect as they misunderstand the relationship between the pendulum's position and its kinetic energy.
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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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