Energy Test Flashcard 2

Front

What is potential energy?

Back

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

Front

How do you calculate potential energy?

Back

Potential energy (PE) is calculated using the formula: PE = mgh, where m = mass (kg), g = acceleration due to gravity (9.81 m/s²), and h = height (m).

Front

What is kinetic energy?

Back

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

Front

How do you calculate kinetic energy?

Back

Kinetic energy (KE) is calculated using the formula: KE = 1/2 mv², where m = mass (kg) and v = velocity (m/s).

Front

What is the law of conservation of energy?

Back

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.

Front

At which position does a pendulum have the greatest potential energy?

Back

A pendulum has the greatest gravitational potential energy at its highest point (Position D).

Front

What is the formula for gravitational potential energy?

Back

The formula for gravitational potential energy is PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

What is the unit of energy?

Back

The unit of energy is the Joule (J).

Front

If a roller coaster has a mass of 112 kg at a height of 72 m, what is its potential energy?

Back

PE = mgh = 112 kg * 9.81 m/s² * 72 m = 79,027 J.

Front

If a bat has a mass of 1.5 kg and swings at 55 m/s, what is the kinetic energy?

Back

KE = 1/2 mv² = 1/2 * 1.5 kg * (55 m/s)² = 2269 Joules.