ارتعاش

In simple harmonic motion the acceleration is proportional to:

• 1 The displacement, directed to the mean position
• 2 The velocity
• 3 The time
• 4 The mass only

The time period of a mass m on a spring of constant k is:

• 1 2 pi sqrt(m / k)
• 2 pi sqrt(m / k)
• 3 2 pi m k
• 4 2 pi sqrt(k / m)

A pendulum has period 2 s. What is its length? (g = pi squared, about 9.87 m/s²)

• 1 1 m
• 2 2 m
• 3 0.5 m
• 4 4 m

At the mean position of SHM, the speed is:

• 1 Constant
• 2 Zero
• 3 Half of maximum
• 4 Maximum

Resonance occurs when the driving frequency equals the:

• 1 Zero
• 2 Natural frequency
• 3 Half the natural frequency
• 4 Double the natural frequency

The total energy of a body in SHM is proportional to the square of its:

• 1 Time
• 2 Amplitude
• 3 Frequency only
• 4 Mass only

Damped oscillations have an amplitude that:

• 1 Increases with time
• 2 Stays constant
• 3 Doubles each cycle
• 4 Decreases with time

The frequency of a vibrating system is 5 Hz. Its period is:

• 1 25 s
• 2 0.5 s
• 3 0.2 s
• 4 5 s