The Visiora blog

Physics, explained so it sticks

Clear, accurate explanations of Class 8–10 science topics — each one paired with an interactive lab you can play with.

A scientific diagram illustrating free fall showing two objects of different masses dropping in a vacuum chamber alongside velocity vectors.

What is Free Fall Class 9? Notes, Formula & Examples

Learn what free fall is in Class 9 Physics (NCERT). Explore the definition, acceleration due to gravity (g), formulas, solved numericals, and quick labs.

19 October 2026·12 min read

Illustration showing a comparison of falling objects and gravity between Earth and the Moon against a starry space background.

Gravity on the Moon: Value, Formula & Lab (Class 9)

Learn the value of acceleration due to gravity on the Moon, derive the formula, and explore fun virtual labs. Perfect for CBSE & NCERT Class 9 physics!

19 October 2026·14 min read

Do heavier objects fall faster? Galileo's free-fall idea, explained

A bowling ball and a basketball dropped from 30 m land almost together. Here is why mass doesn't decide how fast things fall, and when air changes the answer.

19 October 2026·3 min read

Diagram comparing speed as a scalar quantity and velocity as a vector quantity with directional arrows.

Difference Between Speed and Velocity: Class 9 Physics

Master the difference between speed and velocity for CBSE Class 8–10. Includes comparison tables, formulas, real-world examples, and solved problems.

19 October 2026·9 min read