# How much has the potential energy of a 20kg boy who climbed the stairs of his house

September 14, 2021 | education

| **How much has the potential energy of a 20kg boy who climbed the stairs of his house to a height of 15m increased?**

Data: m (boy’s weight) = 20 kg; Δh (the height the boy climbed up the stairs) = 15 m.

Reference values: g (acceleration due to gravity) = 9.81 m / s2.

The increase in the boy’s potential energy can be calculated by the formula: ΔEp = m * g * Δh.

Let’s make a calculation: ΔEp = 20 * 9.81 * 15 = 2 943 J.

Answer: The boy’s potential energy will increase by 2,943 J.

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