Moments, Laws of Moments & Simple Machines is one of 9 topics in the Grade 10 Technical Sciences CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. What is the SI unit of the moment of a force (torque)?
N.m
N
N.m^-1
m.s^-2
Answer: N.m — The moment of a force (torque) is measured in newton-metres (N.m), the product of force (N) and perpendicular distance (m).
Easy
2. How is the moment of a force about a point defined?
The turning effect of the force about that point
The total magnitude of the force
The mass of the object the force acts on
The speed at which the force is applied
Answer: The turning effect of the force about that point — The moment of a force about a point is defined as the turning effect of the force about that point.
Medium
3. A force of 40 N is applied at a perpendicular distance of 0,5 m from a pivot point. Calculate the moment of the force, in N.m.
Answer: 20 — Torque = F x r-perpendicular = 40 x 0,5 = 20 N.m.
