Conservation of Mechanical Energy

Front

What is the definition of mechanical energy?

Back

Mechanical energy is the sum of potential energy and kinetic energy in a system.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of motion, calculated using the formula KE = 1/2 mv², where m is mass and v is velocity.

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state, commonly calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

How do you calculate kinetic energy?

Back

Kinetic energy (KE) is calculated using the formula KE = 1/2 mv².

Front

How do you calculate potential energy?

Back

Potential energy (PE) is calculated using the formula PE = mgh.

Front

What happens to mechanical energy in a closed system?

Back

In a closed system, the total mechanical energy remains constant, as energy is conserved.

Front

What is the relationship between kinetic energy and velocity?

Back

Kinetic energy is proportional to the square of the velocity; if velocity doubles, kinetic energy increases by a factor of four.

Front

Where is kinetic energy greatest in a pendulum?

Back

Kinetic energy is greatest at the lowest point of the pendulum's swing.

Front

Where is potential energy greatest in a pendulum?

Back

Potential energy is greatest at the highest points of the pendulum's swing.

Front

What is the principle of conservation of mechanical energy?

Back

The principle states that in the absence of non-conservative forces (like friction), the total mechanical energy of a system remains constant.