Question

what is the second law of motion ?

Answer 1

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Newton's second law of motion pertains to the behavior of objects for which all existing forces are not balanced.

The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.

Newtons second law of motion give change in momentum of a body.
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Answer 2

Heya!

The second law of motion states that the rate of change of momentum of a body is directly proportional to the force applied to change the momentum.

Mass = m,
Initial Velocity = v,
Time = t.
Initial Momentum(p1) = mu
Final Momentum(p2) = mv
Change in momentum(p2-p1) = mv - mu
Rate of change of momentum = (mv-mu)/t
or,
m[(v-u)/t]

But, (v-u)/t is change in velocity, or, accelaration.......

So, rate of change of momentum = ma,
where, acceleration is a........

By Second Law of motion,
If Force = F,

F ∝ ma
or, F = kma,
where, k is the constant of proportionality and its value is always 1.........

So, F = ma.............

This is the mathematical formulation of newtons second law of motion.......Pls mark as brainiest.....