Newton’s law of motion

1. Newton’s first law of motion

Newton’s first law of motion states that, “Everybody in this universe continues its state of rest or uniform motion in a straight line unless it is acted imbalanced forces”.It means that a body does not change its state of rest or motion itself. The first law of motion is also known as the law of inertia.

Some examples of the phenomena that are explained by Newton’s first law of motion and inertia are as follows:

  • When a branch of mango is shaken, the mangoes fall down.
  • Passengers jerk forward when brakes are suddenly jammed on a moving bus.
  • When a wet shirt is flapped water droplets come out.
  • It is dangerous to jump out from a moving bus.

2. Newton’s second law of motion

It is also called law of acceleration. The law states that,” Acceleration produced on a moving body is directly proportional to the force applied in the direction of motion and inversely proportional to the mass of the object.”

Some examples of the phenomena that are explained by Newton’s second law of motion are as follows:

  • It is difficult to walk in a sandy place.
  • A cricketer moves his/her hands along with the ball to catch it.
  • An empty truck moves faster than a loaded truck.
  • It is easier to drag a stone rather than to kick it.

3. Newton’s third law of motion

Newton’s third law of motion state that, “To every action there is an equal and opposite reaction.” It is also called the law of action-reaction. I.e. A pair of forces acts on two different bodies. The magnitude of forces is equal but act in the opposite directions.

Some examples of the phenomena that are explained by the third law of motion are as follows:

  • When the bullet is fired, the gun recoils.
  • A swimmer pushes the water backward to move his/her body forward.
  • The burnt hot air moves downward and the rocket moves upward.
  • When a person jumps from a boat onto a shore, the boat moves back.

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