Simple Harmonic Motion Review

Which one of the following statements always applies to a damping force acting on a vibrating system?

• It is in the same direction as the acceleration.

• It is in the same direction as the displacement.

• It is in the opposite direction to the velocity.

• It is proportional to the displacement.

Which one of the following statements concerning forced vibrations and resonance is correct?

• An oscillating body that is not resonating will return to its natural frequency when the forcing vibration is removed.

• At resonance, the displacement of the oscillating body is 180° out of phase with the forcing vibration.

• A pendulum with a dense bob is more heavily damped than one with a less dense bob of the same size.

• Resonance can only occur in mechanical systems.

What is k constant?

• Stiffness

• Young Modulus

• Mass

• Damping

What is the different between free and forced vibrations?

• only free vibration oscillates in natural frequency.

• forced vibration frequency is natural frequency.

• forced vibration is caused by external oscillating source.

• free vibration has no external source of motion.

Potential Energy is often described as _________ energy.

• moving

• stored

• static

• radiant

Kinetic Energy is often described as __________ energy.

• oscillating

• stored

• static

• moving

Motion when a varying force is used to drive an oscillating system

• Reverberation
• Over damping
• Forced oscillation
• Natural frequency

​the tendency of a vibrating object to lose or to dissipate its energy over time

• Damping

• Forced vibration

• Restoring force

• Oscillation

• Period

​the force that acts on an object to return it to equilibrium position

• Damping

• Forced vibration

• Restoring force

• Oscillation

• Period

Repetitive periodic motion

• Damping

• Forced vibration

• Restoring force

• Oscillation

• Period