Question # 1

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

The direction of vector in space is specified by

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1- angle

2- angle

3- angle

4 - angle

Name the quantity which is a vector.

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Speed

Force

Temperature

Density

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 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

Parallel vectors of same magnitude will be

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Equal

Opposite

Both a and b

None of these

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

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

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

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A vector is denoted by

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Light face

Bold face

Both a and b

None of these

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

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Component vector

Position vector

-ve vector

Resultant vector

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

Vector has both of its components are negative lies in

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1st quadrant

2nd quadrant

3rd quadrant

4th quadrant

Dot product of vector with itself is.

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Zero

2 A

A²

A

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

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

Direction of a vector in space requires

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Two axis

Three axis

Four axis

Both a and b

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

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Unit vector

+ve of a vector

Resultant vector

-ve of a vector

Vectors have

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Numerical value

Directional

Both a and b

None of these

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