Chapter 1: Resolution of Forces
Authored by A Lunan
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7th Grade
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Explain how Pythagoras' theorem and trigonometry can be used to calculate the magnitude and direction of forces acting on a structure.
By using the sine and cosine functions to resolve forces into components and applying Pythagoras' theorem to find the resultant force.
By using only the tangent function to find the angle of the force.
By applying Pythagoras' theorem directly to find the angle of the force.
By using trigonometry to calculate the mass of the structure.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the vertical component (Fv) of a 90N force acting at a 30° angle?
Fv = 45N
Fv = 60N
Fv = 75N
Fv = 90N
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the horizontal component (Fh) of a 90N force acting at a 30° angle?
Fh = 77.94N
Fh = 45N
Fh = 90N
Fh = 60N
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Resolve the following force into its horizontal and vertical components: 10N at 30°.
Horizontal: 5N, Vertical: 8.66N
Horizontal: 8.66N, Vertical: 5N
Horizontal: 10N, Vertical: 0N
Horizontal: 0N, Vertical: 10N
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Resolve the following force into its horizontal and vertical components: 6kN at 60°.
Horizontal: 3 kN, Vertical: 5.2 kN
Horizontal: 5.2 kN, Vertical: 3 kN
Horizontal: 4 kN, Vertical: 4 kN
Horizontal: 3 kN, Vertical: 3 kN
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Resolve the following force into its horizontal and vertical components: 200N at 40°.
Horizontal: 153.2N, Vertical: 128.6N
Horizontal: 128.6N, Vertical: 153.2N
Horizontal: 200N, Vertical: 0N
Horizontal: 0N, Vertical: 200N
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Resolve the following force into its horizontal and vertical components: 25kN at 70°.
Horizontal: 8.55 kN, Vertical: 23.49 kN
Horizontal: 23.49 kN, Vertical: 8.55 kN
Horizontal: 21.37 kN, Vertical: 9.13 kN
Horizontal: 9.13 kN, Vertical: 21.37 kN
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