A-LEVEL Physics: 4.2.2: Couples (SaveMyExams)

Question 1

What is a ‘Force Couple’?

Answer 1

A Force Couple is a Pair of Equal & Opposite Coplanar Forces that Act to Produce Rotation Only.

Question 2

a Force Couple Consists of a Pair of Forces that are: (3)

Answer 2

-Equal in Magnitude.

-Opposite in Direction.

-Perpendicular to the Distance Between them.

Question 3

Couples Produce a Resultant Force of…

Answer 3

Zero.

Question 4

Why do Objects that have a Force Couple Not Accelerate?

Answer 4

Because Force Couples Produce a Resultant Force of Zero.

Question 5

When a Force Couple Acts on an Object, the Object does not ___. Why is this?

Answer 5

Accelerate. Because Force Couples Produce a Resultant Force of Zero.

Question 6

Unlike Moments of a Single Force, the Moment Caused by a Force Couple doesn’t Depend on a ___. Why?

Answer 6

Pivot. Because the Forces are Equal & Opposite.