When a wheel, 1m in diameter, makes 30 rev/min, the linear speed of point on its rim in ms-1 is:
Correct answer: C. π/2
- A. 2π
- B. 3π
- C. π/2
- D. 4π
Explanation
First find the value of angular speed in rad/s ω = (30 x 2π) / 60 = π V = ω x r = π x 0.5 = π/2 (radius = diameter/2 = 1/2 = 0.5m)
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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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