Energy and Its Forms - Science 10th Class

How do you classify and calculate different forms of energy?

Energy is the ability to cause change.

What limits the speed at which the ball will leave the racket?

What is energy measured in?

Identify three different forms of energy.

What is the formula for calculating kinetic energy?

What is kinetic energy dependent on?

The chemical energy of food is the same as the energy that comes from the Sun.

Energy

Energy is the ability to cause change.
The availability of energy limits what occurs in a system.
Energy is transferred when work is done.
Energy is measured in joules (J).

Different Forms of Energy

Mechanical energy: Energy from motion or position of objects. (e.g., a moving tennis racket).
Electrical energy: Energy from the flow of electrons. (e.g., a lightbulb).
Chemical energy: Energy stored in chemical bonds. (e.g., food, gasoline).
Radiant energy: Energy that travels in waves (e.g., sunlight).

Kinetic Energy

Energy of motion.
Equation: KE = ½mv²
- KE = kinetic energy
- m = mass
- v = velocity

Potential Energy

Stored energy due to position or configuration. (e.g., a book on a table).
Gravitational potential energy: Energy related to an object's height and Earth's gravity.
- Equation: GPE = mgh
  - GPE = gravitational potential energy
  - m = mass
  - g = acceleration due to gravity (approx. 9.8 N/kg)
  - h = height
Elastic potential energy: Energy stored in stretched or compressed objects. (e.g., a stretched rubber band)

This quiz explores the fundamental concepts of energy, including its definition, different forms, and the equations for kinetic and potential energy. Test your understanding of mechanical, electrical, chemical, and radiant energy, along with key formulas in energy calculations.