At what altitude will the potential energy of a boy weighing 48 kg be equal to 4800 J?

These tasks: m (weight of the boy in question) = 48 kg; En (potential energy of the boy) = 4800 J.

Reference values: g (acceleration due to gravity) ≈ 10 m / s2.

We express the height at which the boy in question should be from the formula: En = m * g * h, whence h = En / (m * g).

Let’s calculate: h = 4800 / (48 * 10) = 10 m.

Answer: The boy in question must be at a height of 10 m.