BECE Science 2023 Paper

Concept:Gravitational potential energy is the energy stored in a body due to its height above the ground.It is calculated using the product of mass, acceleration due to gravity, and height.Explanation:The formula for gravitational potential energy is $PE = mgh$Here, mass of the pupil is $m = 70\,\mathrm{kg}$Acceleration due to gravity is $g = 10\,\mathrm{m/s^2}$Height of the building is $h = 15\,\mathrm{m}$Substitute the given values into the formula:$PE = 70 \times 10 \times 15$First, $70 \times 10 = 700$Then, $700 \times 15 = 10{,}500$Thus, the potential energy is $10{,}500\,\mathrm{J}$.This value is measured in joules.Answer:The pupil's potential energy at the top of the building is $10{,}500\,\mathrm{J}$.Therefore, the correct option is A.