Newton's three laws of motion with examples
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★Newton's first law of motion :
The first law of motion is stated as:
An object remains in the state of rest or of uniform motion in a straight line unless compelled to change that state by an applied unbalanced force.
EXAMPLE: When a motor car makes a sharp turn at a high speed ,we tend to get thrown to one side . This can again be explained on the basis of the law of inertia .We tend to continue in our straight line motion . When an unbalanced force is applied by the engine to change the direction of motion of the motor car, we move to one side of the seat due to the inertia of our body.
★Newton's second law of motion :
The second law of motion states that:
The rate of change of momentum of an object is directly proportional to the applied unbalanced force in the direction of force.
EXAMPLE: Let us consider a situation in which a car with a dead battery is to be pushed along a straight road to give it a speed of 1 m/s-1 which is sufficient to start it's engine . If one or two persons give a sudden push (unbalanced force) to it, it hardly starts .But a continuous push over a distance results in a gradual acceleration of the car to the required speed .It means that the change of momentum of the car is not only determined by the magnitude of the force is exerted. It may also be concluded the momentum of the object depends on the rate at which the momentum is changed.
★Newton's third law of motion:
Newton's third law of motion states that for every action there is an equal and opposite reaction.
EXAMPLE:
The fixed and B of the balance is attached to a rigid support like a wall. when a force is applied through the free end of the spring balance A, it is observed that both the spring balances show the same readings on their scales. It means that the force exerted but spring balance A on balance B is equal but opposite in direction to the force exerted by the balance B on balance A . The force which balance A exerts on balance B is called action and the force of balance B on balance A is called the reaction.
The first law of motion is stated as:
An object remains in the state of rest or of uniform motion in a straight line unless compelled to change that state by an applied unbalanced force.
EXAMPLE: When a motor car makes a sharp turn at a high speed ,we tend to get thrown to one side . This can again be explained on the basis of the law of inertia .We tend to continue in our straight line motion . When an unbalanced force is applied by the engine to change the direction of motion of the motor car, we move to one side of the seat due to the inertia of our body.
★Newton's second law of motion :
The second law of motion states that:
The rate of change of momentum of an object is directly proportional to the applied unbalanced force in the direction of force.
EXAMPLE: Let us consider a situation in which a car with a dead battery is to be pushed along a straight road to give it a speed of 1 m/s-1 which is sufficient to start it's engine . If one or two persons give a sudden push (unbalanced force) to it, it hardly starts .But a continuous push over a distance results in a gradual acceleration of the car to the required speed .It means that the change of momentum of the car is not only determined by the magnitude of the force is exerted. It may also be concluded the momentum of the object depends on the rate at which the momentum is changed.
★Newton's third law of motion:
Newton's third law of motion states that for every action there is an equal and opposite reaction.
EXAMPLE:
The fixed and B of the balance is attached to a rigid support like a wall. when a force is applied through the free end of the spring balance A, it is observed that both the spring balances show the same readings on their scales. It means that the force exerted but spring balance A on balance B is equal but opposite in direction to the force exerted by the balance B on balance A . The force which balance A exerts on balance B is called action and the force of balance B on balance A is called the reaction.
RamagiriSaiganesh:
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What is inertia
Dynamic inertia
Plzz
Inertia is a word we use when we talk about matter and movement. Basically, our idea of inertia goes back to Sir Issac Newton's first two laws of physics: 1. ... An object in motion tends to stay in motion.
Dynamic force is the process by which the energy from an action increases or decreases. Ex: wind. An inertial force is a force that resists a change in velocity of an object. It is equal to—and in the opposite direction of—an applied force, as well as a resistive force.
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Newton's first law motion : every inanimate object continues to be in a state of rest or of uniform motion in a straight line unless it is acted upon by an external unbalanced force
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Newton's second law of motion : the rate of change of momentum is directly proportional to the applied force and it takes place in the direction of force
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Newton third law of motion: To every action there is always instantaneour,equal and opposite reaction
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