Question

What is couple in physics
Is couple related to torque....if yes give reason..
What is the si unit of couple

Answer 1

A couple is a pair of forces , equal in magnitude , oppositely directed and displaced by perpendicular distance or moment .
The moment (or) torque of couple is calculated by multiplying the size of one of the force by the perpendicular distance between the two forces .
SI unit - Newton metre

Answer 2

A couple is a force which forms two equal and opposite forces .

These forces are equal in magnitude.

They are exactly opposite to each other .

Due to this , they cancel each other .

These forces have an effect on the turning point of the body .

Couple = force × displacement of couple

∴ S.I unit of Couple = Nm

The S.I unit is Nm ( Newton metres ).