7th Grade Bell Ringer

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or state. It has the potential to do work when released.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion. It depends on the mass of the object and the square of its velocity.

Front

How is potential energy calculated?

Back

Potential energy (PE) can be calculated using the formula PE = mgh, where m is mass, g is the acceleration due to gravity, and h is height.

Front

How is kinetic energy calculated?

Back

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

Front

What happens to kinetic energy as the speed of an object increases?

Back

As the speed of an object increases, its kinetic energy increases. Specifically, kinetic energy increases with the square of the velocity.

Front

What is the relationship between potential energy and kinetic energy in a closed system?

Back

In a closed system, the total mechanical energy (potential + kinetic) remains constant, meaning energy can transform from one form to another but is conserved.

Front

At what point does an object have maximum potential energy?

Back

An object has maximum potential energy at its highest point in a gravitational field.

Front

At what point does an object have maximum kinetic energy?

Back

An object has maximum kinetic energy at its lowest point in a gravitational field, where its speed is greatest.

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 factors affect the potential energy of an object?

Back

The potential energy of an object is affected by its mass, height above the ground, and the strength of the gravitational field.