Question

State Newton's first and second law of motion​

Answer 1

Newton's First Law of Motion:

An object remains in a state of rest or of uniform motion in a straight line unless compelled to change that state by an applied force, i.e., if there is no external unbalanced force applied on a body, if a body is at rest it will be at rest, if a body is in uniform motion it will continue its motion on the straight line forever.

Newton's Second Law of Motion:

Newton's second law states that the rate of change of momentum of an object is directly proportional to the applied unbalanced force in the direction of force.

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Answer 2

$\large \leadsto\underline{\boxed{\blue{ \pmb{ \bf{Newton's \: second \: law \: of \: motion}}}} }$

Newton’s Second Law states that the acceleration of an object depends upon two variables – the net force acting on the object and the mass of the object.

• The acceleration of the body is directly proportional to the net force acting on the body and inversely proportional to the mass of the body.
• This means that as the force acting upon an object is increased, the acceleration of the object is increased. Likewise, as the mass of an object is increased, the acceleration of the object is decreased.

Newton’s second law can be formally stated as,

• The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

Above statement is expressed in equation form as,

a = Fnet/m

F = ma

Since force is a vector, Newton’s second law can be written as

$\fcolorbox{black}{w}{F⃗ =ma⃗ }$

The equation shows that the direction of the total acceleration vector points in the same direction as the net force vector.