Question

Why do we need extra energy on mountains​

Answer 1

Answer:

We need extra energy especially on the mountains because we climb against the gravitational force which usually pulls us down and we also need to walk on the rough surface to balance all these we need that extra energy.

Answer 2

Answer:

we need extra energy especially on the mountains because we climb against the gravitional force which usually pulls us down and we also need to walk on the rough surface to balance all this we need that extra energy