what are Newton's three laws of motion
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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: Let us consider two spring balances connected together as shown in ( SEE THE ATTACHMENT).
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.
see the above attachment for Newton's third law of motion.
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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: Let us consider two spring balances connected together as shown in ( SEE THE ATTACHMENT).
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.
see the above attachment for Newton's third law of motion.
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First law of motion => An object remains in a state of rest or of uniform motion in a straight path unless forced to change that state by an applied force.
The second law of motion => The second law of motion states that the rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of force.
Third law of motion => The third law of motion states that when one object applies a force on another object, the second object instantaneously applies a force back on the one.
The second law of motion => The second law of motion states that the rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of force.
Third law of motion => The third law of motion states that when one object applies a force on another object, the second object instantaneously applies a force back on the one.
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