IIT (NTSE/Olympiad)  

Newton's Laws Of Motion & Friction

1. First Law Of Motion

1. First Law of Motion
According to this law, every body continues in its state of rest or motion in a straight line unless it is compelled by external force to change that state.
(i) This law is also called law of inertia. Inertia is a virtue by which a body opposes the state of rest or motion.
(ii) Force is such a factor, which is essential for change in translatory motion of a body.
(iii) The first law of motion defines the force.
Example :
(a) To remove the dust particles from a cloth by shaking it
(b) Banking of the passengers (towards the motion of bus), sitting in a bus on applying the sudden brakes.

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IIT (Class X)