Kinematics is the branch of mechanics dealing with the study of the motion of particles,
without taking into account the forces and energies involved.
A particle (point object) is an object without extent. A particle is said to be at rest if its
position, relative to the surroundings, does not change with respect to time. A particle is said
to be in motion if its position, relative to the surroundings, changes with respect to time.
Motion and rest refer to the state of bodies described in relation to its surroundings.
Example: Consider any building on the Earth. It is at rest with respect to the Earth. Since the
Earth revolves a round the sun as well as it rotates on its own axis, all the objects on the Earth
are in motion. Hence, there is no absolute rest. It means the building is at rest with respect to
its surroundings but in motion with respect to sun.
Types of Motion
In day to day life, we come across various types of motion, like the motion of the planet, the
motion of wind, etc.
Motion can be classified into:
1. Random motion
2. Translational motion
3. Rotational motion
4. Oscillatory or vibratory motion
💯
ReplyDelete