Question # 1

If x-component of a vector is -3 N and y-component is 3 N, then angle of resultant vector will x-axis is:

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45°

315°

135°

225°

When a vector is multiplied by a negative number, its direction:

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Remains the same

Changes

Changes by 180°

None of these

A force of 5 n is acting Y-axis. Its component along X-axis is:

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7 N

5 N

Zero

10 N

The driection of vector si space is specified by:

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One angle

Two angles

Three angles

None of above

Choose the set of physical quantities, which have both numerical and directional properties:

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Velocity, mass

Speed, acceleration

acceleration weight

Distance, force

All trigonometric functions (since, cosine tangent etc. ) are positive in:

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1st Quadrant

2nd Quadrant

3rd Quadrant

4th Quadrant

If the vector 5 N lies along with x-axis, then its component along y-axis will be:

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Zero

5 N

7 N

10 N

The change of order of vectors in a dot product of two vectors:

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Changes its value

Doesn't change it's value

Changes the direction product quantity

None of these

A vector of magnitude 5 N is added to a vector of magnitude 8 N while the orientations are changeable. Range of their possible sum will be very from:

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Zero to 3 N

1 N to 13 N

13 N to 3 N

None of these

The vector is space has:

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One Component

Two Compnents

Three Components

Non of these

A vector of magnitude 5 N is added to a vector of magnitude 8 N while the orientations are changeable. Range of their possible sum will be very from:

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Zero to 3 N

1 N to 13 N

13 N to 3 N

None of these

Two vectors having different magnitudes:

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Have their directions opposite

May have their resultant zero

Cannot have their resultant zero

None of these

If two forces of magnitudes 3.5 and 2.5 N act on a body such that the angle between the forces is zero, then magnitude of the resultant will be:

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1.0 N

6 N

3.5 N

12 N

Unit vector is used to specify:

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Magnitude of a vector

Dimensions of a vector

Direction of a vector

Position of a vector

The magnitude of resultant of three vectors is 3. Its x-component is one, y-component is two, then its z-component is:

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0

1

2

3

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