4a._work_energy_power

What does the Law of Conservation of Energy state?

Energy cannot be created or destroyed, only transformed from one form to another.

What is the formula for work when force and distance are parallel?

W = Fd (Work equals force times distance).

What is the unit of work?

The joule (J), equivalent to one newton-meter (N·m).

What is positive work?

Work done that increases the speed of an object.

What happens to work done when force is applied perpendicularly to motion?

The work done is zero.

Define kinetic energy.

The energy an object possesses due to its motion, given by the formula K = (1/2) mv².

What does the Work–Energy Theorem state?

A system gains or loses kinetic energy by transferring it through work.

What is the formula for gravitational potential energy?

U = mgh (where U is potential energy, m is mass, g is acceleration due to gravity, and h is height).

How is power defined?

Power is the rate at which work is done or energy is transferred, expressed as P = W/t.

In a closed system without nonconservative forces, how is mechanical energy defined?

The total mechanical energy is conserved: E = K + U (where K is kinetic energy and U is potential energy).