Forces doing work

What is work in physics?

Work is done when a force applied to an object moves that object in the direction of the force.

Formula for work done?

Work (W) is calculated as W = Force (F) x Distance (d) x cos(θ), where θ is the angle between the force and the direction of motion.

What unit is work measured in?

Work is measured in joules (J) in the International System of Units (SI).

What is kinetic energy?

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

What is potential energy?

Potential energy is stored energy based on an object's position or state, commonly gravitational potential energy given by PE = mgh.

What is the relationship between work and energy?

Work done on an object increases its energy, while work done by an object decreases its energy.

What is gravitational force?

Gravitational force is the attractive force between two masses; it does work on objects when they move in a gravitational field.

What is frictional force?

Frictional force opposes the motion of an object and does negative work when it acts against the direction of movement.

What is the work-energy theorem?

The work-energy theorem states that the work done by the net force acting on an object equals the change in its kinetic energy.

How does an applied force do work?

An applied force does work on an object when it causes that object to move in the direction of the force applied.