Question # 1

Direction of a vector in space requires

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Two axis

Three axis

Four axis

Both a and b

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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

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

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5

4

3

2

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

The components of a vector which are perpendicular to each other are called

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Horizontal components

Vertical components

Rectangular components

All of these

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

Two vector can be added by simple arithmetical method when they are at an angle of.

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120^o

90^o

0^o

45^o

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

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45°

60°

75°

90°

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

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5 N

6 N

1 N

7 N

Which is the example of vector quantity

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Torque

Speed

Density

Work

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

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

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Remains constant

Reversed

Change by 90°

None of these

Force 12 N and 5 N are add, the resultant con not be

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13 N

6 N

7 N

17 N

A vector is denoted by

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Light face

Bold face

Both a and b

None of these

Maximum number of components of a vector may be

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Infinite

One

two

three

A force of 100 N makes an angle of 60o with Y- Axis, its horizontal component is.

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50 N

60 N

70.7 N

86.6 N

Name the quantity which is a vector.

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Speed

Force

Temperature

Density

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

The dot product of two vectors A and B will be zero, if angle between A and B is

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Zero

30^o

90^o

180^o

The direction of vector in space is specified by

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1- angle

2- angle

3- angle

4 - angle

The direction of null vector can be

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(+) ve

(-) ve

Arbitrary

Zero

A force of 100 N makes on angle of 60^owith y axis, its horizontal component is.

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50 N

60 N

70.7 N

86.6 N

The subtraction of a vector is equivalent to the addition with

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Same direction

Perpendicular direction

Reversed direction

All of these

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