Question

In damped motion, what decreases with time?

1. Frequency

2. Amplitude

3. Wavelength

4. Period

The purpose of a shock absorber on a car is to prevent the car from bouncing when you go over a pot hole. Therefore a shock absorber should be:

1. underdamped

2. overdamped

Resonance will occur when:

1. the excitation frequency is near the natural frequency

2. the damping is small

3. both the excitation frequency is near the natural frequency and the damping is small

Answer 1

In damped motion, the amplitude decrease with time. The shock absorbers should be over damped. Resonance will occur when both the excitation frequency is near the natural frequency and the damping is small.