Question # 1

Maximum number of components of a vector may be

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Infinite

One

two

three

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

Vectors have

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Numerical value

Directional

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

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 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

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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

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

Dot product of vector with itself is.

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Zero

2 A

A²

A

Usually the x-axis is taken as

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Vertical axis

Horizontal axis

+ve axis

-ve axis

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

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5 N

6 N

1 N

7 N

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

Name the quantity which is a vector.

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Speed

Force

Temperature

Density

A vector is denoted by

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Light face

Bold face

Both a and b

None of these

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 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

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

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

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 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

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