A boy of Mass 20kg stands on a building floor 12m above the ground level. Calculate his potential energy.
Correct! The potential energy of the boy is 2400 J (joules).
PE = mgh
Mathematics
I cannot solve unless I have the formula
Mgh
20×12
2400.00
Oh, what a high-flying situation we have here! To calculate the potential energy of our boy, we multiply his mass (20kg) by the gravitational acceleration (9.8 m/s²) and the height (12m). So, the potential energy becomes 20kg × 9.8 m/s² × 12m, which is equal to... drumroll please... 2,352 joules! That's a whole lot of potential energy just waiting to be converted into kinetic energy!
To calculate the potential energy of an object, we need to use the formula:
Potential Energy = Mass × Gravity × Height
where:
- Mass is the mass of the object,
- Gravity is the acceleration due to gravity (approximately 9.8 m/s^2 on Earth), and
- Height is the vertical distance above a reference point.
In this case, the mass of the boy is given as 20 kg, and the height above the ground level is 12 m. Let's calculate the potential energy:
Potential Energy = 20 kg × 9.8 m/s^2 × 12 m
Potential Energy = 2352 Joules
Therefore, the potential energy of the boy is 2,352 Joules.