Vectors Test

Result

Vectors Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

Fifty vectors, each of magnitude 10 units, are represented by the sides of a polygon, all taken in the same order. What is the resultant?

A
50

B
30

C
20

D
Zero
Question 2
1 / -0

The vectors A and B are such that |A + B| = |A – B|, then the angle between the two vectors will be _____

A
0°

B
60°

C
90°

D
180°
Question 3
1 / -0

If A and B are two vectors, then which of the following options is true?

A
A – B = B – A

B
A × B = B × A

C
A + B = B + A

D
All of these
Question 4
1 / -0

Which of the following statements is NOT true?

A
The component of a vector perpendicular to itself is zero vector.

B
An angle between two vectors can be greater than 180°.

C
A vector cannot be divided by a vector.

D
The resultant of three coplanar vectors can be zero vector.
Question 5
1 / -0

The magnitude of the vector product of two vectors is √3 times their scalar product. What is the angle between the vectors?

A
π/2

B
π/6

C
π/3

D
π/4
Question 6
1 / -0

A boatman can row with a speed of 10 kmh^-1. If a river of width 2 km flows at 5 kmh^-1, then what is the direction in which the boatman should row to reach a point on the other bank directly opposite to the point from where he started?

A
Along the flow

B
60° in NW

C
90° to the direction of flow

D
120° to the direction of flow
Question 7
1 / -0

The work done by force is defined by W = F.S. In a certain situation F and S are not equal to zero, but work done is zero. From this what can be concluded?

A
F and S are in the same direction.

B
F and S are in the opposite directions.

C
F and S are at right angles.

D
F > S
Question 8
1 / -0

The magnitude of the resultant of two vectors is 12 units. If the magnitude of one vectors is 20 units, what is the magnitude of the other vector? (Given: The resultant is at right angels to the other vector)

A
12 units

B
20 units

C
16 units

D
18 units

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Re-Attempt Weekly Quiz Competition

Vectors Test - 3

Result

Vectors Test - 3

Score

-

Rank

-

SHARING IS CARING

Question 1

50

30

20

Zero

Question 2

0°

60°

90°

180°

Question 3

A – B = B – A

A × B = B × A

A + B = B + A

All of these

Question 4

The component of a vector perpendicular to itself is zero vector.

An angle between two vectors can be greater than 180°.

A vector cannot be divided by a vector.

The resultant of three coplanar vectors can be zero vector.

Question 5

π/2

π/6

π/3

π/4

Question 6

Along the flow

60° in NW

90° to the direction of flow

120° to the direction of flow

Question 7

F and S are in the same direction.

F and S are in the opposite directions.

F and S are at right angles.

F > S

Question 8

12 units

20 units

16 units

18 units

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