Energy Flashcard 2

Front

What is kinetic energy?

Back

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

Front

What happens to kinetic energy when an object rolls across a surface?

Back

The kinetic energy is transformed into thermal and sound energy due to friction with the surface.

Front

What is the difference between velocity and kinetic energy?

Back

Velocity is a vector quantity that describes the speed and direction of an object, while kinetic energy is a scalar quantity that depends on the mass and speed of the object.

Front

Why are there typically more herbivores than carnivores in an ecosystem?

Back

More energy is available to herbivores than to carnivores because energy decreases as it moves up the food chain.

Front

What type of energy is associated with a moving object?

Back

Kinetic Energy.

Front

How is energy efficiency calculated?

Back

Energy efficiency is calculated using the formula: Efficiency = (Useful energy output ÷ Total energy input) * 100.

Front

What is potential energy?

Back

Potential energy is the stored energy of an object due to its position or state. For example, a raised object has gravitational potential energy.

Front

What is the relationship between mass and kinetic energy?

Back

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

Front

What is thermal energy?

Back

Thermal energy is the internal energy of an object due to the kinetic energy of its molecules. It is often associated with heat.

Front

What is radiant energy?

Back

Radiant energy is the energy of electromagnetic waves, such as light. It can be transferred through space.