Power and Energy Physics Flashcard

Front

What is mechanical energy?

Back

Mechanical energy is the sum of kinetic and potential energy in a system. For example, a roller coaster demonstrates the conservation of mechanical energy as it converts between kinetic and potential energy during its ride.

Front

How do you calculate kinetic energy?

Back

Kinetic energy (KE) is calculated using the formula: KE = 1/2 * mass (m) * velocity (v)^2.

Front

What is the principle of energy conservation?

Back

The principle of energy conservation states that energy cannot be created or destroyed, only transformed from one form to another.

Front

Calculate the kinetic energy of an object with a mass of 6 kg and a velocity of 8 m/s.

Back

384 joules

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or height. It is calculated using the formula: PE = mass (m) * gravity (g) * height (h).

Front

Calculate the potential energy of an object with a mass of 10 kg and a height of 5 meters.

Back

250 joules

Front

What is kinetic energy?

Back

Kinetic energy is the energy of motion possessed by an object. For example, a moving car has kinetic energy due to its motion.

Front

How do you calculate the potential energy of an object?

Back

Potential energy (PE) is calculated using the formula: PE = mass (m) * gravity (g) * height (h).

Front

What happens to energy when a ball is thrown into the air?

Back

When a ball is thrown into the air, its initial kinetic energy is converted into potential energy at the highest point of its trajectory, and then back into kinetic energy as it falls back down.

Front

Calculate the kinetic energy of a car with a mass of 1000 kg traveling at a speed of 20 m/s.

Back

200,000 joules