CAPE Physics Unit 1 · 2014 · Paper 1 · Question Q14

A body falls from a cliff 80\text{ m} above the ground. If it loses 25\% of its energy overcoming friction, what is its velocity on impact with the ground? [g = 9.8\text{ N kg}^{-1}]

1. (A)19.8\text{ m s}^{-1}
2. (B)28.0\text{ m s}^{-1}
3. (C)34.3\text{ m s}^{-1}
4. (D)39.6\text{ m s}^{-1}