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inertia the resistance an object has to a alter in its state of motionnewtons first law of motion declares that force is not required to keep an
inertia and massnewtons 1st law of motion describes that an object at rest stays at rest and an object in motion stays in motion with the similar
if the speed of light were smaller than it is would relativistic phenomena be more or less conspicuous than they are nowall else being similar
ballistic flight a flight in which a projectile is given a starting push and is permitted to move freely due to inertia and under the action of
application to ballistic missiles an unpowered and unguided missile is known as ballistic missile the path followed by ballistic missile is known
range of projectile it is the horizontal distance covered by the projectile from the point of projection to the point where it returns to its
time of flightit is the total time for which the projectile remains in airas the body goes up and comes back to similar level so it does not cover
projectilewhen a body is thrown upward making a particular angle q with the horizontal and moves freely under the action of gravity it is known as a
rocket propulsionthe motion of a rocket is an application of the law of conservation of momentum and newtons 3rd law of motion the gases ejected out
inelastic collision the collision in which total momentum is preserved but total ke of system is not conserved is known as inelastic collisionit
elastic collision the collision in which both linear momentum and ke are conserved is said to be elastic
head-on collision if the centers of the colliding bodies stay moving along the similar straight line the collision is said to be head-on
collision when two or more bodies come close to each other so that there is some part of interaction among them with or without the presence of
law of conservation of momentumthe total linear momentum of an isolated system always
isolated systemwhen a number of bodies are like that they can exert force upon one another and no external agency exerts a force on them they are
second definition of impulseit can be described as the change in momentum produced by the force of
dimension of unit impulsedimension the dimension of impulse is
unitsi unit of impulse is ns newton x second or
impulsewhen a force acts on a body for a very short time the product of the force and the time for which the force acts is called the impulse or
momentum or linear momentumit is described as the product of mass and velocity of the
examplesi when the book is lying on a table it exerts a downward force on the table because of its weight this force is known as action the table
explanationwhenever an interaction occurs among two objects each object exerts the similar force on the other but in the opposite direction and for
newtons third law of motionthis law can be described as actions and reactions are equal and
dimension of newtondimension the dimension of force is
newton the force which forms an acceleration of 1 ms-2 in a mass of 1 kgit is represented by