Energy Bellringer

Front

What is gravitational potential energy?

Back

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

Front

How do you calculate gravitational potential energy?

Back

Gravitational potential energy (PE) is calculated using the formula: PE = mgh, where m = mass (kg), g = acceleration due to gravity (9.81 m/s² or 10 m/s² for simplicity), and h = height (m).

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object has due to its motion, calculated as 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 happens to gravitational potential energy as an object falls?

Back

As an object falls, its gravitational potential energy decreases while its kinetic energy increases, conserving the total mechanical energy.

Front

What is the significance of height in gravitational potential energy?

Back

Height is a crucial factor in gravitational potential energy; the higher an object is, the more potential energy it has due to its position in the gravitational field.

Front

What is the relationship between mass and gravitational potential energy?

Back

Gravitational potential energy is directly proportional to mass; as mass increases, gravitational potential energy increases, assuming height remains constant.

Front

What is the gravitational potential energy of a 2 kg book on a shelf 5 meters high?

Back

Using PE = mgh, PE = 2 kg * 10 m/s² * 5 m = 100 Joules.

Front

What is the gravitational potential energy of an object at ground level?

Back

The gravitational potential energy of an object at ground level (h = 0) is 0 Joules, as there is no height to contribute to potential energy.

Front

What is the kinetic energy of a 10 kg cat running at 5 m/s?

Back

Using KE = 1/2 mv², KE = 1/2 * 10 kg * (5 m/s)² = 125 Joules.