CW College Energy, Work, and Power

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 the potential energy of an object?

Back

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

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 the kinetic energy of an object?

Back

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

Front

What is the work-energy principle?

Back

The work-energy principle states that the work done on an object is equal to the change in its kinetic energy.

Front

What is work in physics?

Back

Work is defined as the transfer of energy that occurs when a force is applied to an object and the object moves. It is calculated using the formula: Work = Force x Distance x cos(θ), where θ is the angle between the force and the direction of motion.

Front

What is the formula for calculating work done by a force?

Back

The formula for calculating work done is: Work = Force x Distance x cos(θ), where θ is the angle between the force and the direction of displacement.

Front

What does it mean if work done is zero?

Back

If the work done is zero, it means that either no force was applied, there was no displacement, or the force was perpendicular to the direction of displacement.

Front

What is the significance of the angle in the work formula?

Back

The angle in the work formula determines how much of the force contributes to the work done. A force applied in the same direction as the displacement does maximum work, while a force perpendicular to the displacement does no work.

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the potential energy associated with an object's height above the ground. It is calculated using the formula: PE = mgh.