CBSE Class 9 - Chapter: Motion

Flashcards covering important definitions, concepts, and formulas related to motion.

Motion

A body is said to be in motion if it changes its position with time.

Distance

Total path length covered by an object.

Displacement

The shortest distance between the initial and final positions.

Uniform Motion

Equal distances in equal intervals of time.

Non-uniform Motion

Unequal distances in equal intervals of time.

Speed

Distance travelled per unit time, calculated as Speed = Distance / Time.

Velocity

Displacement per unit time, calculated as Velocity = Displacement / Time.

Acceleration

Rate of change of velocity, calculated as Acceleration = (Final Velocity - Initial Velocity) / Time.

Scalar Quantity

A quantity that has only magnitude, such as distance and speed.

Vector Quantity

A quantity that has both magnitude and direction, such as displacement and velocity.

Zero Acceleration

Occurs in uniform motion where there is no change in velocity.

Distance-Time Graph

A graph that shows a straight line for uniform motion.

Velocity-Time Graph

A graph where the area under the graph gives displacement.

Conversion Factor from km/h to m/s

Multiply km/h by 5/18 to convert to m/s.