Understanding Gravitational Potential Energy: Calculations and Examples

The video tutorial explains gravitational potential energy, how it changes with height, and how to calculate it using the formula involving mass, gravitational field strength, and height change. It provides examples of lifting and lowering a book and kicking a football to illustrate these concepts.

What happens to the energy stored in an object when it is lifted vertically?

• It decreases.

• It is converted to kinetic energy.

• It remains the same.

• It increases.

Which of the following is NOT a component of the gravitational potential energy formula?

• Velocity of the object

• Gravitational field strength

• Mass of the object

• Change in height

If a book is lifted to a higher shelf, what happens to its gravitational potential energy?

• It decreases.

• It remains constant.

• It becomes zero.

• It increases.

When a book is lowered from a height, what is the sign of the change in gravitational potential energy?

• Undefined

• Zero

• Negative

• Positive

In the example of the football, what is the change in gravitational potential energy when it reaches the top of the kick?

• 200 joules

• 150 joules

• 100 joules

• 50 joules

What is the gravitational field strength used in the football example?

• 20 newtons per kilogram

• 15 newtons per kilogram

• 10 newtons per kilogram

• 5 newtons per kilogram

How high does the football reach if its change in gravitational potential energy is 100 joules?

• 10 meters

• 15 meters

• 25 meters

• 20 meters