Question # 1

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 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 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

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

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 subtraction of a vector is equivalent to the addition with

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Same direction

Perpendicular direction

Reversed direction

All of these

Head to tail rule is used for

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Addition of vectors

Subtraction of vectors

Multiplication of vectors

Division of vectors

The direction of vector in space is specified by

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1- angle

2- angle

3- angle

4 - angle

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

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45°

60°

75°

90°

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

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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

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

Direction of a vector in space requires

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Two axis

Three axis

Four axis

Both a and b

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

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 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

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 magnitude of A will be

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Zero

A²

1

A

Which is the example of vector quantity

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Torque

Speed

Density

Work

The force and torque are analogous to

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Velocity

Mass and weight

Moment of Inertia

Each other

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