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# The period of a simple pendulum X is 5s. What is the period of a simple pen...

### Question

The period of a simple pendulum X is 5s. What is the period of a simple pendulum Y which makes 50 vibrations in the same time it takes X to make 20 vibrations?

A) 12.5s

B) 2.5s

C) 2.0s

D) 1.2s

### Explanation:

$$T_x = \frac{20}{5} = 4s$$

$$T_y = \frac{50}{4} = 12.5s$$

## Dicussion (1)

• $$T_x = \frac{20}{5} = 4s$$

$$T_y = \frac{50}{4} = 12.5s$$