CAPE Physics Unit 1 · 2017 · Paper 1 · Question Q5

An object falls freely under gravity, g, from a height of 12.5\text{ m}. Which of the following equations can be used to determine the time, t, taken for the object to reach the ground?

1. (A)t = \sqrt{\frac{25}{g}}
2. (B)t = \sqrt{\frac{g}{25}}
3. (C)t = \frac{g}{25}
4. (D)t = \frac{25}{g}