Question

calculate the potential energy of an object at rest weighing 5kg when placed at aheight of 5m above the level of the ground.Given gravitational constant g=9.8ms-1

Answer 1

Answer:

Mass of the object: m = 5 kg Displacement (height) h = 5 m

Acceleration due to gravity g = 9.8 ms-2 Formula to find potential energy: mass x gravity x height = mgh

Substituting, 5kg x 9.8 ms x 5 m = 245 J

Potential energy = 245 J

Answer 2

Answer:

The potential energy in the object is 245 kg m² s⁻².

Explanation:

Potential Energy

• It is the energy stored inside an object because of its position relative to other objects.
• The formula of potential energy is mass × acceleration due gravity × height.
• The units of gravitational potential = kg m² s⁻².

Calculation:

P.E = mgh

The data given in the question:

1. Mass = 5 kg
2. Height = 5 m
3. Acceleration = 9.8 m s⁻²

P.E = 5 × 9.8 × 5

= 245 J or 245 kg m² s⁻²

Conclusion:

The potential energy stored in the 5 kg object at 5 m height is 245 J or 245 kg m² s⁻².