If an object of a certain mass is placed at a height, by how much is its gravitational potential energy changed?

The gravitational potential energy of an object is determined by the formula:

PE = m * g * h

where: PE is the potential energy, m is the mass of the object, g is the acceleration due to gravity (approximately 9.8 m/s² on Earth), and h is the height above the ground.

So, if an object of a certain mass is placed at a height, its gravitational potential energy is changed by the amount m * g * h.

For example, if you have an object with a mass of 2 kg and you place it at a height of 3 meters, the change in gravitational potential energy would be:

PE = 2 kg * 9.8 m/s² * 3 m = 58.8 Joules

So, the gravitational potential energy of the object would increase by 58.8 Joules.