Question

State and derive Newton’s Second Law of motion
pls answer in simple way dont answer in complicated way

Answer 1

Answer:

According to this law , " the force acting on a body is directly proportional to the rate of change of linear momentum of the body and the change in momentum takes place in the direction of the force".

Let , 'm' be the mass of a moving body, moving along a straight line with an initial speed 'u' After a time interval of 't' , the velocity of the body changes to 'v' due to the impact of an unbalanced external force F.

Initial momentum of the body Pi is mu

Final momentum of the body Pf is mv

Change in momentum delta p is Pf - Pi

mv - mu

By Newton's second law of motion,

Force, F directly proportional to the rate of change of momentum

F directly proportional to the rate of change of momentum/ time

F directly proportional to the rate of change of momentum mv - mu / t

F equal to km( v-u)/ t

here, k is the proportionally constant.

k equal to 1 in all systems of units . Hence,

F equal to m(v-u) / t

Since, acceleration equal to change in velocity / time,

a equal to ( v-u) / t.

hence, we have

F equal to m into a

Force equal to mass into acceleration

Explanation:

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