Conservation of Energy

Front

What is the Law of Conservation of Energy?

Back

The Law of Conservation of Energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

Define Kinetic Energy (KE).

Back

Kinetic Energy is the energy possessed by an object due to its motion, calculated as KE = 1/2 mv², where m is mass and v is velocity.

Front

Define Gravitational Potential Energy (GPE).

Back

Gravitational Potential Energy is the energy an object possesses due to its position in a gravitational field, calculated as GPE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is the formula to calculate Total Mechanical Energy (TME)?

Back

Total Mechanical Energy (TME) is the sum of Kinetic Energy (KE) and Gravitational Potential Energy (GPE): TME = KE + GPE.

Front

How does energy transformation occur in a pendulum?

Back

In a pendulum, energy transforms between kinetic energy and gravitational potential energy as it swings. At the highest point, GPE is maximum and KE is minimum; at the lowest point, KE is maximum and GPE is minimum.

Front

What happens to the total energy in a closed system?

Back

In a closed system, the total energy remains constant, as energy can only change forms but cannot be lost or gained.

Front

What is the relationship between height and GPE?

Back

Gravitational Potential Energy increases with height; as an object's height increases, its GPE increases, assuming mass and gravity remain constant.

Front

How do you calculate the Kinetic Energy of an object with a mass of 2 kg moving at a speed of 3 m/s?

Back

Using the formula KE = 1/2 mv², KE = 1/2 (2 kg)(3 m/s)² = 9 J.

Front

What is the significance of energy conservation in real-world applications?

Back

Energy conservation is crucial in engineering, environmental science, and technology, as it helps in designing efficient systems and understanding energy transfer in natural processes.

Front

What is an example of energy transformation in a roller coaster?

Back

In a roller coaster, potential energy is converted to kinetic energy as the coaster descends from a height, and kinetic energy is converted back to potential energy as it ascends.