Physics: Work and Power Flashcard

Front

What is the formula for calculating work?

Back

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

Front

What is the definition of power in physics?

Back

Power is the rate at which work is done or energy is transferred, calculated as Power (P) = Work (W) / Time (t).

Front

What is the SI unit of energy?

Back

The SI unit of energy is the Joule (J).

Front

How is kinetic energy defined?

Back

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.

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy stored in an object due to its height above the ground, calculated as PE = mgh, where m is mass, g is acceleration due to gravity, and h is height.

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in its energy; energy can be transferred or transformed but cannot be created or destroyed (Law of Conservation of Energy).

Front

What is the difference between work and energy?

Back

Work is the process of energy transfer, while energy is the capacity to do work.

Front

What is the formula for calculating power in terms of energy?

Back

Power (P) = Energy (E) / Time (t).

Front

What is the principle of conservation of energy?

Back

The principle states that energy cannot be created or destroyed, only transformed from one form to another.

Front

How does mass affect gravitational potential energy?

Back

Gravitational potential energy increases with mass; doubling the mass of an object doubles its potential energy at a given height.