Two pendulums C and D are suspended from a wire

Force, Work, Power, Energy (10)

Two pendulums C and D are suspended from a wire as shown in the figure given below. Pendulum C is made to oscillate by displacing it from its mean position. It is seen that D also starts oscillating.

1. Name the type of oscillation, C will execute.
2. Name the type of oscillation, D will execute.
3. If the length of D is made equal to C then what difference will you notice in the oscillations of D?
4. What is the name of the phenomenon when the length of D is made equal to C?

Answer

(i) Free vibration / damped vibrations

(ii) Forced vibrations

(iii) D vibrates with the same amplitude as C or C and D vibrate with maximum amplitude alternately.

(iv) Resonance

• Exam Year: 2019