Isaac Newton was the greatest English mathematician of his generation. He laid the foundation for differential and integral calculus.

His work on optics and gravitation make him one of the greatest scientists the world has known.

Newton First LawAn Object at rest remain at rest and an

object in motion will continue in motion at constant speed in a straight line in the absent of a resultant force

According to Newton's first law, an object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force. It is the natural tendency of objects to keep on doing what they are doing. All objects resist changes in their state of motion. In the absence of an unbalanced force, an object in motion will maintain its state of motion. This is often called the law of

inertia.

This animation shows that the truck is running towards the car without the ladder strapped.

The truck hits the car and the ladder which isn’t strapped is more likely to maintain its state of motion so the ladder slide off the top of the truck and be hurled into the air

p=mv p=momentum m=mass v=velocity

F=maF=force m=mass a=acceleration

Everyone unconsciously knows the Second Law. Everyone knows that heavier objects require more force to move the same distance as lighter objects.

Newton's second lawThe rate of change of momentum of an object

is directly proportional to the resultant force acting on that object and has the same direction as the force

F α mv-mu/t

Newton's third law An action and it’s reaction are always equal

in magnitude but oppositely directed on two different bodies.

Newtons Three Laws

This is how a rocket works.

The rocket's action is to push down on the ground with the force of its powerful engines, and the reaction is that the ground pushes the rocket upwards with an equal force.

Question

Question

Question

Liner Momentum and it’s conservationThe principle of conservation of linear

momentum states that the total momentum of a closed system of colliding objects remains constant if no external forces act on that system

Elastic collisions

The characteristics of an elastic collision are:a) The total linear momentum of the colliding

objects is always conserved U1 U2 V1

V2

m1u1 +m2u2 = m1v1 +m2v2

b) The total kinetic energy is conserved

1/2m1u1 + 1/2m2u2 = 1/2 m1v1 + 1/2m2v2

Inelastic CollisionsThe characteristics of an inelastic collision are:a) The total linear momentum of the colliding

objects is always conserved

b) The total kinetic energy is not conserved U1 U2 V

m1u1 +m2u2 = (m1 +m2)v

elastic collision in physics

Questions

Questions

.

For elastic collision the relative speed of approach before collision is always equal to the relative speed of separation .

U1 U2 V1 V2

U1 -U2=V2 -V1 

Question

Question

Question

ImpulseImpulse is define as the change in

momentum . Obtain through area under Force- time

graph.  F

t