Question # 1

The law of parallelogram of addition was used by Aristotle to describe the combined action of :

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One force

Two forces

Three forces

Four forces

Which of the following is not a vector quantity ?

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Weight

Mass

Force

Velocity

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Unit Vector

Null vector

Position vector

None of these

A scalar quantity is one that possesses only :

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Magnitude

Direction

Both a and b

None of these

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28

29

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2 - 7

2 + 7

i.(j.k) =

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Meaningless

-1

1

2

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Position vector of O

Position vector of P

Unit vector

Null vector

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60°

90°

30°

45°

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Unit vector

Null vector

Position vector

None of these

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0

1

-1

2

The cross product or vector product of two vectors is defined:

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Only in plane

Only in space

Both a and b

None of these

Which are the following triples can be direction angles of a single vector:

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45°,45°,60°

30°,45°,60°

45°,60°,60°

30°,30°,30°

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0

1

-1

2

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Unit vector

Null vector

Free vector

None of these

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3

4

5

6

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0

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Free vector

Unit vector

Null vector

None of these

Which of the following is a vector quantity ?

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Work

Temperature

Distance

Displacement

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Position vector

Null vector

Unit vector

None of these

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x - axis

z - axis

y - axis

None of these

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0

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