Scalar quantities: - A scalar quantity is one that has got just magnitude (dimension) and no direction. Example: Speed, Work, Electricity
Vector quantities: - A vector quantity is one that has got magnitude (dimension) as well as direction। Example: Velocity, Force, Electrical Fields।
Force is a vector quantity. Means to correctly specify force you need to mention the direction of force and the magnitude of force। The unit of force is Newton।
Newton's three laws of motions are: -
1) A body will continue to be in its state of rest or in its state of motion unless a force is implied on it to change its state of rest / motion
2) The rate of change of momentum of a system is directly proportional to the external force impressed on it and takes place in the direction of application of force।
3) To every action there is an equal and opposite reaction.
