Question

What is the potential energy of a 2 kg mass at a height of 40 meters?

Answer 1

The potential energy of a 2 kg mass at a height of 40 meters is 784 J

Step-by-step explanation:

Potential energy is that energy that a body possesses due to the height at which it is located and whose unit of measurement of the International System of Units is the joule (J).

The potential energy of a body is the result of multiplying its mass by its height and by gravity:

Ep=m*g*h

Potential energy Ep, is measured in joules (J), mass m is measured in kilograms (kg), gravity, g, in meters / second-squared (
`(m)/(s^(2) )`), and height, h , in meters (m).

In this case:

• Ep=?
• m= 2 kg
• g= 9.8
  `(m)/(s^(2) )`
• h= 40 m

Replacing:

Ep= 2 kg* 9.8
`(m)/(s^(2) )` * 40 m

Solving:

Ep= 784 J

The potential energy of a 2 kg mass at a height of 40 meters is 784 J