Mechanical Energy

Front

What is Mechanical Energy?

Back

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

Front

Define Gravitational Potential Energy (GPE).

Back

Gravitational Potential Energy (GPE) is the energy an object possesses due to its position in a gravitational field, calculated as GPE = mgh (mass x gravity x height).

Front

What is Kinetic Energy (KE)?

Back

Kinetic Energy (KE) is the energy an object has due to its motion, calculated as KE = 1/2 mv² (1/2 x mass x velocity squared).

Front

At what point is GPE maximum in a free-falling object?

Back

GPE is maximum at the highest point of the object's path.

Front

At what point is KE maximum in a free-falling object?

Back

KE is maximum just before the object hits the ground.

Front

What happens to GPE as an object falls?

Back

As an object falls, its GPE decreases while its KE increases.

Front

What is the principle of conservation of mechanical energy?

Back

The principle states that in a closed system, the total mechanical energy (GPE + KE) remains constant if only conservative forces are acting.

Front

How do you calculate the total mechanical energy of a system?

Back

Total Mechanical Energy = Gravitational Potential Energy + Kinetic Energy.

Front

What is the relationship between GPE and height?

Back

GPE increases as height increases, assuming mass and gravity remain constant.

Front

What is the relationship between KE and velocity?

Back

KE increases with the square of the velocity; if velocity doubles, KE increases by a factor of four.