How to Calculate Potential Energy
Potential energy is the energy an object possesses due to its position or configuration. It is often associated with objects elevated above the ground and is calculated using the formula: PE = m × g × h, where:
- PE: Potential Energy (in joules)
- m: Mass of the object (in kilograms)
- g: Acceleration due to gravity (9.8 m/s²)
- h: Height of the object above the reference point (in meters)
For example, if a 2 kg object is 5 meters above the ground, the potential energy is: PE = 2 × 9.8 × 5 = 98 J.
FAQs About Potential Energy
- Q1: What is potential energy?
A: Potential energy is the energy stored in an object due to its position or configuration. - Q2: What is the formula for potential energy?
A: The formula is PE = m × g × h. - Q3: What is the SI unit of potential energy?
A: The SI unit is joules (J). - Q4: How does mass affect potential energy?
A: Higher mass results in higher potential energy. - Q5: How does height affect potential energy?
A: Higher height results in higher potential energy. - Q6: What is gravitational potential energy?
A: It is the potential energy associated with an object’s height above the ground. - Q7: Can potential energy be negative?
A: Yes, if the reference point is above the object. - Q8: How is potential energy different from kinetic energy?
A: Potential energy is stored energy; kinetic energy is the energy of motion. - Q9: What are examples of potential energy?
A: A raised weight, a compressed spring, or water stored in a dam. - Q10: What is elastic potential energy?
A: It is the energy stored in elastic materials like springs and rubber bands.