Resultant & Resolution of Forces is one of 9 topics in the Grade 11 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. Which formula gives the resultant of two forces acting perpendicular to each other?
FR^2 = F1^2 + F2^2
FR = F1 + F2
FR = F1 - F2
FR^2 = F1 x F2
Answer: FR^2 = F1^2 + F2^2 — For two forces acting perpendicular to each other, the Theorem of Pythagoras gives FR^2 = F1^2 + F2^2.
Easy
2. Vectors that act along the same straight line are called what?
Co-linear vectors
Co-planar vectors
Perpendicular vectors
Resultant vectors
Answer: Co-linear vectors — Co-linear vectors are vectors that have the same line of action, acting along the same straight line.
Medium
3. Two forces, 6 N and 8 N, act perpendicular to each other on an object. Calculate the magnitude of their resultant, in N.
