Question # 1

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

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45°

60°

75°

90°

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

Name the quantity which is a vector.

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Speed

Force

Temperature

Density

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 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

Direction of a vector in space requires

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Two axis

Three axis

Four axis

Both a and b

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

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Remains constant

Reversed

Change by 90°

None of these

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

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

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Component vector

Position vector

-ve vector

Resultant vector

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Usually the x-axis is taken as

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Vertical axis

Horizontal axis

+ve axis

-ve axis

Head to tail rule is used for

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Addition of vectors

Subtraction of vectors

Multiplication of vectors

Division of vectors

A vector is denoted by

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Light face

Bold face

Both a and b

None of these

Dot product of vector with itself is.

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Zero

2 A

A²

A

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

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

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 3N and 4 N acting at right angle to each other is.

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5 N

6 N

1 N

7 N

What would encourage trade between two countries

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Different tax system

Frontier checks

National currencies

reduced tariffs

When a fore of 100 N is acting on an object along x-axis then its vertical component will be.

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50 N

0 N

25 N

10 N

If a vector of magnitude 10 N along y-axis then its component along x-axis is

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0 N

5 N

8.66 N

10 N

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

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5

4

3

2

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