Work Power and Energy

Front

What is potential energy?

Back

Potential energy is the energy stored in an object due to its position or configuration. It is the energy that has the potential to be converted into kinetic energy.

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, expressed as KE = 1/2 mv².

Front

What does the Law of Conservation of Energy state?

Back

The Law of Conservation of Energy states that energy cannot be created or destroyed, only transformed from one form to another, and the total energy in a closed system remains constant.

Front

What is the Work-Energy Theorem?

Back

The Work-Energy Theorem states that the work done on an object is equal to the change in its kinetic energy. It can be expressed as W = ΔKE.

Front

What is the formula for calculating work?

Back

Work (W) is calculated using the formula W = F × d × cos(θ), where F is the force applied, d is the distance moved, and θ is the angle between the force and the direction of motion.

Front

What unit is used to measure work?

Back

The unit of work is the joule (J), which is defined as the work done when a force of one newton displaces an object by one meter in the direction of the force.

Front

What is the relationship between work and energy?

Back

Work is a means of transferring energy. When work is done on an object, energy is transferred to that object, resulting in a change in its energy state.

Front

What happens to potential energy as an object falls?

Back

As an object falls, its potential energy decreases while its kinetic energy increases, demonstrating the conversion of energy from one form to another.

Front

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

Back

The angle (θ) in the work formula determines how much of the force contributes to the work done. If θ is 0 degrees, all the force does work; if θ is 90 degrees, no work is done.

Front

What is mechanical energy?

Back

Mechanical energy is the sum of potential energy and kinetic energy in a system. It is the energy associated with the motion and position of an object.