Addition and Subtraction of Vectors

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Vectors and Scalars Learning Material

Tutorial ID	Title	Tutorial	Video Tutorial	Revision Notes	Revision Questions
1.2	Addition and Subtraction of Vectors

Addition and Subtraction of Vectors Revision Questions

1. Three forces pull the same object as shown in the figure. What is the magnitude and the direction of the resultant force acting on the object?

1. 8N due left
2. 8N due right
3. 29N due right
4. 66N due left

Reveal AnswerCorrect Answer: A

2. An airplane flies in a straight line for 120km at 370 to the West-East direction and then it flies due North for other 72km. What is the total displacement of the airplane in km? Take cos 370 = 0.8 and sin 370 = 0.6.

1. 173 km
2. 99.7 km
3. 192 km
4. 144 km

Reveal AnswerCorrect Answer: A

The components of three forces acting at the same object are shown in this table

Force Number	x-component (N)	y-component (N)
F⃗1	13	6
F⃗2	-5	1
F⃗3	-2	7

3. What is the magnitude of F⃗1 - F⃗2 + F⃗3 ?

1. 13.4N
2. 15.2N
3. 20.0N
4. 28.0N

Reveal AnswerCorrect Answer: C

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6. Continuing learning vectors and scalars - read our next physics tutorial: Rounding and Significant Figures

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