Gravitational Potential Energy Concepts

This video tutorial covers the concept of gravitational potential energy (GPE), explaining the formula GPE = mgh, where m is mass, g is gravitational field strength, and h is height. The video provides practice questions to apply the formula in different scenarios, including on Earth, the Moon, Mercury, and Jupiter. Each question involves calculating either the GPE, mass, height, or gravitational field strength, reinforcing the understanding of the formula and its application.

What is the formula for gravitational potential energy?

• GPE = mgh

• GPE = mg/h

• GPE = mh/g

• GPE = gh/m

What is the gravitational field strength on Earth?

• 25 N/kg

• 3.6 N/kg

• 1.6 N/kg

• 9.8 N/kg

An object of mass 0.522 kg falls from a height of 15.7 meters on Earth. How much gravitational potential energy is lost?

• 22.6 J

• 80.3 J

• 309 J

• 73.2 J

On the Moon, an object falls from a height of 24 meters and loses 73.2 J of energy. What is the gravitational field strength on the Moon?

• 9.8 N/kg

• 3.6 N/kg

• 1.6 N/kg

• 25 N/kg

Given the energy lost and height, how do you rearrange the GPE formula to find mass?

• m = GPE / h

• m = GPE * gh

• m = GPE / (gh)

• m = GPE * g

An object of mass 1.96 kg falls on Earth and loses 309 J of energy. What is the height from which it fell?

• 24 meters

• 1.6 kilometers

• 7.5 meters

• 16.1 meters

How do you rearrange the GPE formula to find height?

• h = GPE * m

• h = GPE / g

• h = GPE * mg

• h = GPE / (mg)

On Mercury, an object of mass 0.835 kg falls and loses 22.6 J of energy. What is the height from which it fell?

• 7.5 meters

• 16.1 meters

• 24 meters

• 1.6 kilometers

An object falls from a height of 1.6 kilometers on Jupiter and loses 29.5 kJ of energy. What is the gravitational field strength on Jupiter?

• 1.6 N/kg

• 25 N/kg

• 3.6 N/kg

• 9.8 N/kg

What conversion is necessary when dealing with kilojoules in the GPE formula?

• Subtract 1000

• Multiply by 1000

• Divide by 1000

• Add 1000