Conservation of Energy with calculations

Front

What is the principle of conservation of energy?

Back

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

Front

What is Kinetic Energy (KE)?

Back

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

Front

What is Gravitational Potential Energy (GPE)?

Back

Gravitational Potential Energy is the energy an object possesses due to its height above the ground, calculated using the formula GPE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

How do you calculate Total Mechanical Energy (TME)?

Back

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

Front

What happens to energy in a closed system?

Back

In a closed system, the total energy remains constant; energy may change forms but the total amount does not change.

Front

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

Back

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

Front

What is an example of energy transformation?

Back

An example of energy transformation is a roller coaster: as it climbs, kinetic energy is converted to gravitational potential energy, and as it descends, GPE is converted back to KE.

Front

What type of energy is stored in batteries?

Back

The energy stored in batteries is called Chemical Energy.

Front

What is the GPE of an object at ground level?

Back

The Gravitational Potential Energy of an object at ground level is 0 J.

Front

If an object has a mass of 10 kg and is lifted to a height of 5 m, what is its GPE?

Back

GPE = mgh = 10 kg * 9.8 m/s² * 5 m = 490 J.