Kinematics

Understanding motion, displacement, velocity, and acceleration

Topics

How does gravity work?

Gravity is a fundamental force that attracts all objects with mass toward each other. The strength of gravity depends on the mass of the objects and the distance between them, following Newton's law of universal gravitation.

What is acceleration?

Acceleration is the rate at which an object's velocity changes over time. It describes how quickly an object speeds up, slows down, or changes direction.

What is velocity?

Velocity is the rate at which an object changes its position, including both speed and direction. Unlike speed, velocity is a vector quantity that describes how fast something is moving and in which direction.

Why do objects fall?

Objects fall due to gravity, a fundamental force that pulls all objects with mass toward each other. On Earth, gravity pulls objects toward the center of the planet, causing them to fall downward.

Why do objects move?

Objects move because of forces acting on them. According to Newton's laws of motion, an object at rest stays at rest unless acted upon by a force, and an object in motion continues moving unless acted upon by a force.