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The tension force of a tight string always used 

The tension force of a tight string always used  Correct Answer pull an object

Correct option-1

Concept:-

Sir Isaac Newton has given three laws to describe the motion of an object. These laws are known as Newton's laws of motion.

1) NEWTON'S FIRST LAW OF MOTION:-

  • A body that continues to its state of rest will remain in uniform speed in a straight line unless and until it is compelled by an external force to change its state of rest or of uniform motion.
  • Newton's first law recognizes that everybody has some inertia.
  • Inertia is an intrinsic property of the body by the virtue of which it resists a change in its state of rest or of uniform motion.

2) NEWTON'S SECOND LAW OF MOTION:-

  • The net force applied to a body is equal to the rate of change of momentum.
  • For the case of mass, force equals mass times acceleration.
  • i.e. F = ma

Where,

  •  F = force applied
  • m = mass and
  • a = acceleration.
  • Unlike Newton’s first law of motion, Newton's second law of motion pertains to the behavior of objects for which all existing forces are unbalanced.
  • Newton's second law of motion is more quantitative and is used extensively to calculate what happens in situations involving a force.

3) NEWTON'S THIRD LAW OF MOTION:-

  • It states that to every action there will be an equal and opposite reaction.
  • i.e. “when one object exerts a force on the other object, the first object experiences a force which is equal in magnitude in the opposite direction of the force which is exerted”.

 

Explanation:-

I.The tension force is defined as the contact force that is transmitted through a rope, string, or wire

when pulled by forces acting from opposite sides.

II.It is directed over the length of the wire and pulls energy equally on the bodies at the ends.

III. Tension in a tight string can only pull on an object.

FBD (Free-Body Diagram)

  • A free-body diagram is a diagram of a given system that is the one in which we represent all the forces acting on it and thus we calculate the net force.
  • Free-body diagrams are used to show the direction and magnitude of all the forces acting upon an object.
  • The length of the arrow in FBD represents the magnitude of the force and arrows are labeled to indicate the type of force.
  • In these diagrams, the object is generally represented like a box and the arrows representing force are drawn from the center of the object.
  • There is no strict rule on the number of forces that can be drawn in a free-body diagram.
  • For an example of a book placed at rest on the ground, figure (b) is given below.

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