Question # 1

When a vector is multiplied by a (-)ve number its direction

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Remains constant

Reversed

Change by 90°

None of these

The direction of null vector can be

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(+) ve

(-) ve

Arbitrary

Zero

A force of 10N makes an angle 30o with y axis. Then magnitude of x -component is.

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5 N

8.66 N

10 N

Zero

A vector is denoted by

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Light face

Bold face

Both a and b

None of these

The angle between x-axis, y-axis and z-axis is

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45°

60°

75°

90°

Which is the example of vector quantity

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Torque

Speed

Density

Work

The magnitude of A will be

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Zero

A²

1

A

The resultant of two vectors having magnitude 12 N and 8 N can not be

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2 N

20 N

10 N

16 N

The resultant of two forces 3 N and 4 N acting at right angle to each other is

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7 N

5 N

4 N

1 N

The resultant of two forces 30 N and 40 N acting parallel to each other is.

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30 N

40 N

70 N

10 N

Vectors have

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Numerical value

Directional

Both a and b

None of these

Vector has both of its components are negative lies in

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1st quadrant

2nd quadrant

3rd quadrant

4th quadrant

The subtraction of a vector is equivalent to the addition with

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Same direction

Perpendicular direction

Reversed direction

All of these

The force and torque are analogous to

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Velocity

Mass and weight

Moment of Inertia

Each other

Direction of a vector in space requires

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Two axis

Three axis

Four axis

Both a and b

What would encourage trade between two countries

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Different tax system

Frontier checks

National currencies

reduced tariffs

Minimum number of unequal forces whose vector sum can be zero are.

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5

4

3

2

A direction of torque is

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Along the position vector r

Perpendicular to both r and f

Along the direction of force F

Opposite to the direction of r

If r = 5 m and f = 4 N are along same direction, them torque is

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20 Nm

5 Nm

10 Nm

Zero

Dot product of two non zero vectors is zero it angle between them is.

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30^o

60^o

45^o

90^o

Maximum number of components of a vector may be

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Infinite

One

two

three

The sum of two or more vectors will be a single vector called

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Component vector

Position vector

-ve vector

Resultant vector

Head to tail rule is used for

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Addition of vectors

Subtraction of vectors

Multiplication of vectors

Division of vectors

The resultant of two vectors having magnitude 10 N and 8 N Can not be

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2 N

9 N

18 N

20 N

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