Question # 1

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

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

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5

4

3

2

Head to tail rule is used for

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Addition of vectors

Subtraction of vectors

Multiplication of vectors

Division of vectors

Usually the x-axis is taken as

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Vertical axis

Horizontal axis

+ve axis

-ve axis

Dot product of vector with itself is.

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Zero

2 A

A²

A

The direction of vector in space is specified by

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1- angle

2- angle

3- angle

4 - angle

Parallel vectors of same magnitude will be

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Equal

Opposite

Both a and b

None 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

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Unit vector

+ve of a vector

Resultant vector

-ve of a vector

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

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

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

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

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

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 magnitude of A will be

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Zero

A²

1

A

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