Question

please do it as fast as possible...​

Answer 1

Question: A body of mass 3 kilograms is taken to a height of 5 metres against the gravitational force. Calculate the potential energy of the body. g = 9.8 m/s²

Provided that:

• Mass = 3 kilograms
• Height = 5 metres
• g = 9.8 m/s²

To calculate:

• Potential energy

Solution:

• Potential energy = -147 J

Using concept:

• Potential energy formula against gravitational force.

Using formula:

• Potential energy formula against gravitational force = -mgh

Where, m denotes mass, g denotes acceleration due to the gravity and h denotes the height.

Required solution:

→ P.E = -mgh

→ P.E = -3(9.8)(5)

→ P.E = -15(9.8)

→ P.E = -147 J

→ Potential energy = -147 Joules $\:$

Additional information:

➟ Potential energy = The capacity of doing work developed in a body due to it's position or configuration is known as potential energy like, ⑴ energy of stretched or compressed string ⑵ energy of spring in a watch ⑶ energy of water collected at a height.