formula newton of2 law motion
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Explanation:
F is proportional to change in linear momentum/ change in time
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Answer:
The first law has already given us a qualitative definition of force. Now we are interested in finding out its magnitude. According to Newton’s second law of motion, the net force experienced by a body is directly proportional to the rate of change of momentum of the body. It can be written as:

f∝dPdt⇒f∝mv−mut⇒f∝m(v−u)t⇒f∝ma⇒f=kmaWhere k is the constant of proportionality and it comes out to be 1 when the values are taken in SI unit. Hence the final expression will be,
F = ma
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