U4.A Conservation of Mechanical Energy

Front

What is stored energy called?

Back

Potential energy

Front

What is the formula for calculating Kinetic Energy (KE)?

Back

KE = 1/2 mv²

Front

What is the acceleration due to gravity (g) on Earth?

Back

9.8 m/s²

Front

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

Back

GPE = mgh

Front

What is the sum of kinetic and potential energy in a system called?

Back

Mechanical energy

Front

If an object has a mass of 2 kg and is lifted to a height of 5 m, what is its GPE?

Back

GPE = mgh = 2 kg * 9.8 m/s² * 5 m = 98 J

Front

What happens to potential energy as an object falls?

Back

It is converted to kinetic energy.

Front

What is the relationship between mechanical energy and energy conservation?

Back

Mechanical energy is conserved in a closed system without friction.

Front

If a roller coaster car has a mechanical energy of 100 joules, what does this include?

Back

It includes both kinetic and potential energy.

Front

What is kinetic energy when an object is at rest?

Back

0 joules, because KE = 1/2 mv² and v = 0.