Unit 3 - Energy and Conservation (2)

Front

What is kinetic energy?

Back

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

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses due to its position in a gravitational field. It is calculated using the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

At which point in a pendulum's swing is the kinetic energy greatest?

Back

The kinetic energy of a pendulum is greatest at the lowest point of its swing, where it is moving the fastest.

Front

At which point in a pendulum's swing is the gravitational potential energy greatest?

Back

The gravitational potential energy of a pendulum is greatest at the highest points of its swing, where it is momentarily at rest.

Front

How does height affect gravitational potential energy?

Back

Gravitational potential energy increases with height. The higher an object is, the more potential energy it has due to its position in a gravitational field.

Front

What happens to kinetic energy as an object falls?

Back

As an object falls, its gravitational potential energy is converted into kinetic energy, causing it to accelerate and increase its speed.

Front

What is the relationship between kinetic energy and velocity?

Back

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

Front

How do you calculate the total mechanical energy of an object?

Back

Total mechanical energy is the sum of an object's kinetic energy and gravitational potential energy: E_total = KE + PE.

Front

What is the principle of conservation of energy?

Back

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

Front

What is the formula for calculating gravitational potential energy?

Back

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