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A couple acting on a body produces:

A couple acting on a body produces: Correct Answer Rotation without translation

CONCEPT:

Torque:

  • Torque is a physical quantity that can cause an object to rotate about an axis.
  • Force is what causes an object to accelerate in linear kinematics. Similarly, torque is what causes an angular acceleration. Hence, torque can be defined as the rotational equivalent of linear force.
  • Torque is a vector quantity.
  • Its SI unit is N-m.
  • If F force is acting at a distance r from the axis of rotation at an angle θ as shown in the figure, then the torque is given as,

​⇒ τ = F.r.sinθ

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EXPLANATION:

Couple:

  • A pair of forces of equal magnitude but acting in opposite directions with different lines of action is known as a couple or torque.
  • A couple produces rotation without translation. Hence, option 1 is correct.
  • Examples:
    1. When we open the lid of a bottle by turning it, our fingers are applying a couple to the lid.

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