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Course: Applied Mathematics — Second Secondary
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Curriculum

Applied Mathematics — Second Secondary

Unit 1: Statics

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Unit 2: Solid and Analytic Geometry

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Quiz

Equilibrium of a Rigid Body under Coplanar Forces — Lesson quiz

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  • Questions count: 6
  • Passing grade: 60%
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1.
What are the two conditions of equilibrium for coplanar concurrent forces?
ΣX = ΣY
ΣX = 1 and ΣY = 1
ΣX = 0 and ΣY = 0
ΣX + ΣY = 0 only
2.
A body in equilibrium is acted on by a 6 N force along the positive x-axis and an 8 N force along the positive y-axis, together with a third force. What is the magnitude of the third force?
10 N
14 N
2 N
48 N
3.
If ΣX = 0 and ΣY = 0 for a body acted on by three forces, what can we say about the body?
The body moves with uniform acceleration
The body is at rest only and never moves
The three forces are equal in magnitude
The body is in equilibrium
4.
A body of weight 20 N hangs from two strings meeting at one point. The left string makes 60° with the horizontal and the right string makes 30° with the horizontal. What is the tension in the right string?
10√3 N
10 N
20 N
5 N
5.
A body of weight 40 N hangs from a string inclined to the vertical, and a horizontal force of 30 N acts on it to keep it in equilibrium. What is the tension in the string?
35 N
10 N
50 N
70 N
6.
Two perpendicular forces of 7 N and 24 N act on a body in equilibrium. What is the magnitude of the third force that keeps it in equilibrium?
31 N
17 N
25 N
168 N
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