Mechanical Energy

Front

What is Mechanical Energy (ME)?

Back

Mechanical Energy is the sum of kinetic energy (KE) and gravitational potential energy (GPE) in a system.

Front

What is Kinetic Energy (KE)?

Back

Kinetic Energy is the energy an object possesses due to its motion, calculated as 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 position in a gravitational field, calculated as GPE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

At what point is Kinetic Energy (KE) zero?

Back

Kinetic Energy (KE) is zero when the object is at rest, meaning its speed is 0 m/s.

Front

How do you calculate Mechanical Energy (ME)?

Back

Mechanical Energy (ME) is calculated by adding Kinetic Energy (KE) and Gravitational Potential Energy (GPE): ME = KE + GPE.

Front

What happens to Mechanical Energy (ME) in a closed system?

Back

In a closed system, Mechanical Energy (ME) is conserved; it remains constant if only conservative forces are acting.

Front

What is the relationship between speed and Kinetic Energy (KE)?

Back

Kinetic Energy (KE) increases with the square of the speed; if speed doubles, KE increases by a factor of four.

Front

What is the significance of height in Gravitational Potential Energy (GPE)?

Back

Height is significant in GPE because the higher an object is, the more gravitational potential energy it has due to increased distance from the ground.

Front

What is the formula for calculating Gravitational Potential Energy (GPE)?

Back

The formula for GPE is GPE = mgh, where m is mass, g is the acceleration due to gravity (approximately 9.81 m/s²), and h is height.

Front

What is the total Mechanical Energy (ME) at point 3 if KE is 0 J and GPE is 1960 J?

Back

The total Mechanical Energy (ME) at point 3 is 1960 J, as ME = KE + GPE.