Laws of Motion
Inertia and First Law of Motion
- Inertia is the inability of a body to change its state.
- Inertia of rest is the inability of a body to change its state of rest.
- Inertia of motion is the inability of a body to change its state of motion.
- Inertia of direction is the inability of a body to change its state of direction.
- Inertia of rotation is the inability of a body to change its state of rotation.
- Mass is a measure of inertia of rotation.
- The reference frame is associated with a coordinate system and to measure position & time.
- A frame of reference which is at rest or moving with uniform velocity is inertial frame of reference.
- Newton's laws are applicable directly in inertial frame.
- A frame of reference which is moving with non-zero acceleration is called Non inertial frame of reference.
- Newton's law are not valid in Non inertial frame.
- In non inertial frame a false force called pseudo force has to be applied.
- According to Newton's first law of motion everybody continues to be in its state unless an external force acts on it to change its state.
- Newton's first law of motion gives the concept of inertia.
- No formula is derived in Newton's first law.
View the Topic in this video From 0:39 To 53:41
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