Phys-Presentation 4.3 Conservation of Energy

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

Define kinetic energy.

Back

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

Front

Define potential energy.

Back

Potential energy is the stored energy of an object due to its position or state, such as gravitational potential energy or elastic potential energy.

Front

What is internal energy?

Back

Internal energy is the total energy contained within a system, including kinetic and potential energy at the microscopic level.

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of particles in a substance, related to its temperature.

Front

What is chemical energy?

Back

Chemical energy is the energy stored in the bonds of chemical compounds, which can be released during a chemical reaction.

Front

What does E_i represent in the equation E_i + W = E_f?

Back

E_i represents the initial energy of the system before work is done.

Front

What is the role of work (W) in energy conservation?

Back

Work (W) is the energy transferred to or from a system, affecting its total energy.

Front

In a frictionless system, what happens to the total mechanical energy during a collision?

Back

In a frictionless system, the total mechanical energy is conserved during a collision.

Front

What type of energy is stored in a compressed spring?

Back

The energy stored in a compressed spring is called elastic potential energy.