An object is travelling in a circle of radius r with angular velocity ω and speed v. Which expression gives the centripetal acceleration?
Correct answer: B. vω
- A. rω
- B. vω
- C. v/r
- D. v/r2
Explanation
V = ωr Vω = (ω r) x ω = ω2r The formula for acceleration is also; acceleration = ω2r, as this option equates to this formula it is correct.
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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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