Lesson: Chapter 11 — Turning Effect of a Force

11.1. Moment of a force 7 of 16 Reset answers

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Question 7

A force of 5 N is applied perpendicular to a rod at a distance of 0.4 m from the pivot axis. What is the moment of this force about the axis?

A 1.25 N m B 2 N m C 20 N m D 5.4 N m

The right answer is the one marked above.

2 N m. moment = force × perpendicular distance = 5 N × 0.4 m = 2 N m.

Dividing to get 5 ÷ 0.4 = 12.5, or adding to get 5 + 0.4, are the traps here. It is always a multiplication.

Answer the question to continue.