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JAMB Physics 2018 Paper

Question : 27

Total: 87

In the diagram shown, which of the simple pendulum will resonate with P when set into oscillation?

Solution:

Concept:

Resonance occurs when two systems have the same natural frequency; for a simple pendulum, this depends on length.

Explanation:

The period of a simple pendulum is

T = 2\pi\sqrt{\frac{l}{g}}

So, for resonance with P, another pendulum must have the same length as P.

From the diagram, R and T have the same length as P.

Answer:

C. R and T

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