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What is the significance of newton's …

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What is the significance of newton's second law of motion?
  • 1 answers

Yogita Ingle 4 years, 2 months ago

The second law of motion describes what happens to the massive body when acted upon by an external force.  The law states that the force acting on the body is equal to the product of its mass and acceleration.
 

When a constant force acts on a body, the forces result in the acceleration of the body.  However, if the object is already in motion, or if this situation is viewed from a moving frame of reference, the body might appear to speed up or slow down or change its direction depending on the direction of the force.

Mathematically, we express the law as follows:

P = df/dt
⇒f ∝ (mv−mu)/t
⇒f∝m(v−u)/t
⇒f ∝ ma
⇒f = kma

Where 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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