Chapter : 2. Force & Laws Of Motion
Newton's Second Law of Motion
(B) Newton's Second Law of MotionMomentum :
The product of mass and velocity is called 'momentum'. i.e.
(a) Unit :
SI unit of Momentum is kg-m/s.
(b) It is a Vector Quantity.Newton's Second Law States
"the rate of change of momentum of a body is directly proportional to force and takes place in the direction of force."
= initial momentum = mu
= final momentum = mv
(b) Unit of force in SI system is newton.
(c) 1N is equivalent to that force which canproduce an acceleration of 1m/s2
in a body of mass 1 kg.
(d) Unit of force in CGS system is dyne.
1 dyne = 1 gm - cm/s2
1 N = 105
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