Calculate the gravitational potential energy of a 0.2 kg bird flying at 50 meters.

Using the formula: $$PE = mgh = 0.2 \times 9.8 \times 50 = 98 J$$ .

What is the kinetic energy of an 800 kg roller coaster at 25 m/s?

The kinetic energy is calculated as: $$KE = \frac{1}{2}mv^2 = \frac{1}{2} \times 800 \times 25^2 = 250,000 J$$ .

What is the unit of energy in the International System of Units (SI)?

The unit of energy in the SI system is the Joule (J).

What does the variable 'g' represent in energy calculations?

In energy calculations, 'g' represents the acceleration due to gravity, which is approximately 9.8 m/s² on the surface of the Earth.

What is the relationship between height and gravitational potential energy?

Gravitational potential energy increases with height; as an object's height increases, its potential energy increases, assuming mass and gravity remain constant.

How does mass affect kinetic energy?

Kinetic energy is directly proportional to mass; if the mass of an object increases, its kinetic energy increases, provided the velocity remains constant.

What happens to potential energy when an object falls?

As an object falls, its gravitational potential energy decreases while its kinetic energy increases, conserving the total mechanical energy in the absence of air resistance.

What is the significance of the height in potential energy calculations?

Height is crucial in potential energy calculations because it determines the amount of gravitational force acting on the object; higher objects have more potential energy.

Potential and kinetic energy calculations 1 Flashcards

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15 questions

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1.

FLASHCARD QUESTION

Front

What is gravitational potential energy?

Back

2.

FLASHCARD QUESTION

Front

How do you calculate gravitational potential energy?

Back

3.

FLASHCARD QUESTION

Front

What is kinetic energy?

Back

4.

FLASHCARD QUESTION

Front

How do you calculate kinetic energy?

Back

5.

FLASHCARD QUESTION

Front

What is the gravitational potential energy of a 10 kg object at 5 meters?

Back

6.

FLASHCARD QUESTION

Front

Calculate the gravitational potential energy of a 1 kg book on a 2 meter shelf.

Back

7.

FLASHCARD QUESTION

Front

What is the gravitational potential energy of a 0.45 kg soccer ball at 20 meters?

Back

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