Oscillation

What two conditions are required for simple harmonic motion to occur?

• Acceleration is opposite to displacement

• Acceleration is to the direction of displacement

• Acceleration is inversely proportional to displacement

• Acceleration is proportional to displacement

In a simple pendulum, which force brings the mass back to equilibrium?

• Gravitational force

• Elastic force

• Tension

• Friction

What is meant by forced oscillation?

• When an object is vibrating at its natural frequency

• When an object continues to vibrate after the disturbance is removed

• When an object vibrates at a frequency which is different from its natural frequency

• When an object receives a vibration from external sources

Which graph can be used to describe oscillation?

• displacement-time graph

• displacement-length graph

• amplitude-time graph

• time invariant graph

The picture is taken from an oscilloscope. The vertical scale is at 500 mV per division. What is the amplitude of the green signal?

• 0.50 V

• 1.50 V

• 3.00 V

• 5.00 V

The horizontal scale is 10 ns per division. What is the oscillation frequency of the green signal?

• 5.0 kHz

• 10 kHz

• 5.0 MHz

• 10 MHz

What is the period of a simple pendulum with a length of 50.0 cm? (g = 9.81 m s⁻²)

• 0.359 s

• 1.42 s

• 2.48 s

• 2.78 s

An oscillation has a function  $y\left(t\right)=2.0\ \sin\ \left(3.0t\right)$ cm
What is its angular frequency?

• 2.0  $rad\ s^{-1}$  

• 3.0  $rad\ s^{-1}$  

• 0.48  $rad\ s^{-1}$  

• 2.1  $rad\ s^{-1}$  

A mass of 50 g attached to a spring oscillates with a function of  $y\left(t\right)=2\ \sin\left(3t\right)$  cm.
What is its maximum kinetic energy?

• 0.15 J

• 0.45 J

• 0.90 J

• 6.0 J

A pendulum with a mass of 0.10 kg swings with a period of 0.50 s and amplitude of 2.0 cm. What is the speed when the displacement of the pendulum is −1.0 cm?

• 8 cm s⁻¹

• 11 cm s⁻¹

• 22 cm s⁻¹

• 36 cm s⁻¹