Question

please explain newton's laws of motion

Answer 1

NEWTON FIRST LAW OF MOTION STATES THAT A BODY AT REST WHEN WE TEND TO MOVE IT , IT WILL RESIST THE CHANGE IT IS ALSO CALLED INERTIA AND NEWTON'S FIRST LAW OF MOTION IS ALSO CALLED LAW OF INERTIA.
EXAMPLE- WHEN YOU KICK A STONE IT ONLY MOVES A LITTLE DISTANCE THIS IS BECAUSE IT TENDS TO RESIST ITS INERTIA
NEWTON'S SECOND LAW OF MOTION STATES THAT THE RATE OF CHANGE OF MOMENTUM OF AN OBJECT IS PROPOTIONAL TO THE APPLIED UNBALANCED FORCE IN THE DIRECTION OF FORCE
EXAMPLE- IN CRICKET IT IS ADVISED NOT TO DIRECTLY HOLD THE BALL BUT TO HOLD IT AFTER SOME TIME DUE TO NEWTON'S SECOND LAW OF MOTION
NEWTON'S THIRD LAW OF MOTION STATES THAT TO EVERY ACTION THERE IS AN EQUAL AND OPPOSITE REACTION.
NOTE: BUT THE TWO FORCES ACT ON TWO DIFFERENT BODIES.
EXAMPLE- HOW ARE WE ABLE TO WALK WHEN THE TWO FORCES ARE ACTING ON US? IT IS BRCAUSE ONE FORCE IS ACTING ON US AND THE ANOTHER ON THE GROUND.
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Answer 2

Hi friend,

Newton's first law of motion is also known as Law of Inertia.
→Every object which is in either rest or motion tends to remain in its position until an external force exerts.
→The natural tendency of objects to remain at particular position is known as inertia. Inertia depends on mass of the object.
→There are two types of Inertia.
Static Inertia:- The object which is at rest continues it's state until we apply an external force.
Dynamic Inertia:-The object which is in motion continues it's state until we apply an external force.
→Example:-When you stood in a bus which is at rest you are also at rest,but when the bus starts moving, you move backward due to static inertia which tends you to continue in rest position.
In the same way,when bus stops suddenly,you move forward due to dynamic inertia which tends you to continue in motion.

Newton's second law of motion:-
→The rate of change in momentum of a body, is directly proportional to the force applied and this change in momentum takes place in the direction of the applied force.
→Momentum is defined as the product of mass and velocity.
p=mv
→Example:-If you use the same force to push a car and a bicycle,the bicycle moves fast as it accelerates fast and has less mass.As car has more mass,we have to apply more force.
→Simply,we can say that the more mass requires more force.

Newton's third law of motion:-
→If an object exerts force on another object,the second object also exerts force on the first object with same magnitude but in opposite direction.
→For every action,there is an equal and opposite reaction.
→Example:-A bird flying in air exerts force backward with wings and moves forward.
Similarly,a fish exerts force backward with it's fins and moves forward in water.

Hope it helps.....