Newton law of motion - second law, Mechanical Engineering

Newton law of motion:

Second Law

The rate of change of momentum is proportional to external force applied on the body and take place, in the same direction in which the force acts.

Let a body having mass 'm' is moving with a velocity 'u' along a straight line. It is acted upon some force 'F'

and the velocity of body becomes 'v' in time 't' then.

Initial momentum = m.u

Initial momentum = m.v

Change in momentum = m(v-u)

Rate of change of momentum = change of momentum / Time

= m(v-u)/t but         v = u + a.t

a = (v-u)/t

That is, Rate of change of momentum = m.a

But according to second law    F proportional to m.a

That is  F = k.m.a                Where K = constant.

Unit of force

1N = 1 kg-m/sec2  = 105  dyne  = 1 grm.cm/sec2

Posted Date: 10/19/2012 7:14:47 AM | Location : United States







Related Discussions:- Newton law of motion - second law, Assignment Help, Ask Question on Newton law of motion - second law, Get Answer, Expert's Help, Newton law of motion - second law Discussions

Write discussion on Newton law of motion - second law
Your posts are moderated
Related Questions
Determine the distance of application of the load: A rigid bar of negligible weight transmits a load W to a combination of 3 springs as illustrated in Figure. The three spring

Creating a new style To create a new dimension style, make sure the STANDARD style is the current style, click in the Name edit box then type the name of the new style you want

Clutch cable routing :Ensure that the cable is routed as per standard routing, through the brackets provided.


Chisel: Chisels are used in the combination of hammer to remove metals. A set of chisels is shown in Figure. Figure: Chisel

Strain energy stored in a body due to impact load

#what is porosity in welding is this different from pin hole

Corporate level - Safety Organization This is a corporate level and there should be a company director which is engaged in formulating safety policies at corporate level. The

Physical significance of damping coefficient and it''s unit.

Keywords: Degree of Curve      :            The angle subtended at the centre by a chord of 100 ft (30.5 m) length. Super-elevation (cant)        :            The raising