Question

Class 11th !


➡Give me a short notes of law's of motion chapter

______________ No Spam!
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Answer 1

Answer:

the first one is law of inertia

the second is on of the reaction has a equal action

Answer 2

$\large\sf \pink{ \fbox{ \fbox{ \: Law's \: of \: motion \:! \: }}}$

$\sf \red{ \underline{Force : \: \: }}$

Force is a push or pull which change the state of rest or motion or direction of the body

The SI unit of force is Newton

It is vector quantity

A force applied on an object can produced four effects such as :

(i) Force can start or stop a motion

(ii) Force can change the speed of an object making it to move slower or faster

(iii) Force can change the direction of motion of an object

(iv) Force can change the shape of an object

$\sf \red{ \underline{ Inertia : \: \: }}$

The tendency of an object to remains at rest or in motion unless any force is applied

$\sf \red{ \underline{ Newton's \: first \: law \: of \: motion : \: \: }}$

An object at rest remains at rest and in motion remains in motion with same speed and in same direction unless any force is applied

$\sf \red{ \underline{ Law \: of \: inertia : \: \: }}$

Newton's first law of motion is also called law of inertia

$\sf \red{ \underline{Types \: of \: inertia : \: \: }}$

(i) Inertia of rest - the resistance of a body to change its state of rest is called inertia of rest

(ii) Inertia of motion - the resistance of a body to change its state of motion is called inertia of motion

(iii) Inertia of direction - the resistance of a body to change its direction of motion is called inertia of direction

$\sf \red{ \underline{ Newton's \: second \: law \: motion: \: \: }}$

The rate of momentum is directly proportional to the unbalanced force applied on an object

$\sf \red{ \underline{ Newton's \: third \: law \: of \: motion: \: \: }}$

For every action there is equal and opposite reaction

$\sf \red{ \underline{Linear \: momentum : \: \: }}$

The product of mass and velocity is called linear momentum

Law of conservation of linear momentum :

During any collision if the external force on a system is zero then the total momentum before collision is always equal to total momentum before collision

$\sf \red{ \underline{Impulse : \: \: }}$

The change in momentum produced by the force is called impulse

$\sf \red{ \underline{Momentum \: of \: couple \: (torque) : \: \: }}$

The product of force and perpendicular distance between them

$\sf \red{ \underline{Friction : \: \: }}$

The force that opposes the motion of an object , when the object is in contact with another object

$\sf \red{ \underline{Types \: of \: friction : \: \: }}$

(i) Static friction - The force of friction between two surface so long as there is no relative motion between them

(ii) Kinetic friction - The force of friction between two surface so long as there is relative force between them

(iii) Rolling friction - When one body rolls over another , the resistance offered to motion is called rolling friction

$\sf \red{ \underline{Angle \: of \: friction : \: \: }}$

The angle at which the resultant of limiting friction and normal reaction makes with the normal reaction

$\sf \red{ \underline{Angle \: of \: repose : \: \: }}$

The angle of the inclined plane at which a body placed on it just begins to slide is called angle of repose

$\sf \red{ \underline{Centripetal \: force : \: \: }}$

The force required to move an object with a constant speed in a circle is called centripetal force

$\sf \red{ \underline{Centrifugal \: force : \: \: }}$

The force that makes objects outward when they are traveling in a curve

$\sf \red{ \underline{Banking \: of \: road : \: \: }}$

The process of raising the outer edge of a curved road above the level of the inner edge