Question

What is Newton 's second law of Motion ??

No copied Answer !!​

Answer 1

Answer:

"The rate of change of momentum is proportional to the applied force and the change of momentum occurs in the direction of force."

What is Momentum?

Momentum is the product of mass and velocity of an object.

P = m v

[ Momentum is a vector quantity. ]

Suppose an object of mass 'm' has an initial velocity 'u'.

Now, When a force 'F' is applied in the direction of it's velocity for time 't', it's velocity becomes 'v'.

Initial momentum of object = mu

It's final momentum after time 't'= mv

Rate of change of momentum = Change in momentum/ time

Rate of change of momentum =

$\tt{ \frac{mv - mu}{t} = \frac{m(v - u)}{t}} = ma$

$\tt{\frac{v - u}{t} = a}$

According to the second law of motion, the rate of change of momentum is proportional to the applied force.

ma α f

Therefore, F = k ma ( here, k = constant of Proportionality and it's value is 1.)

=> F = m.a

Remember that,

If the same force is applied on different objects,the change of momentum is the same.

Answer 2

Answer:

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.