# General Terms in Kinematics | Physics Class 11

## Notes | Physics General Terms in Kinematics For: Science Class 11

Static: The branch of mechanics which deals with body at rest is called static.
Kinematics: The branch of mechanics which deals with the motion of object without taking causes.
Dynamics: The branch of mechanics which deals with the motion of object taking into consideration the causes.
Distance: The length of the path followed by an object between its initial and final position is called distance.
Displacement: Shortest length of the path between two points in a direction is called displacement.

Difference between distance and displacement are as follows:

 Distance Displacement 1. It is always positive. 2. It is scalar quantity. 3. It depends upon the path followed by an object. 1. It may be positive, negative or zero. 2. It is vector quantity. 3. IT doesn’t depend upon the path.

Speed: The distance travelled by a body in one second is known as speed.
Velocity: Rate of change of displacement with respect to time is called velocity.

Difference between speed and velocity:

 Speed Velocity 1. It doesn’t show any direction 2. It is scalar quantity. 3. It is always positive 1. It shows the direction of motion. 2. It is vector quantity. 3. It may be positive, negative or zero.

Instant Velocity: The velocity at a particular instant of time is called instantaneous velocity.
Instantaneous acceleration: Acceleration at a particular instant of time is known as instantaneous acceleration.

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