In the given figure

 

1.  Angle between A and B is 110°

2.  Angle between C and D is 60°

3.  Angle between B and C is 110°

4.  Angle between B and C is 70°

Subtopic:  Resultant of Vectors |
 67%
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A force of 6 N and another of 8 N can be applied together to produce the effect of a single force of -

(1)  1 N

(2)  11 N

(3)  15 N

(4)  20 N

Subtopic:  Resultant of Vectors |
 70%
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Which of the sets given below may represent the magnitude of resultant of three vectors adding to zero?

(1)  2, 4, 8

(2)  4, 8, 16

(3)  1, 2, 1

(4)  0.5, 1, 2

Subtopic:  Resultant of Vectors |
 72%
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A blind person after walking 10 steps in one direction, each of length 80 cm, turns randomly to the left or to the right by 90°. After walking a total of 40 steps the maximum possible displacement of the person from his starting position could be -

(1)  320 m

(2)  32 m

(3)  16/2 m

(4)  162 m

Subtopic:  Resultant of Vectors |
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The resultant of two vectors A and B is perpendicular to the vector A and its magnitude is equal to half the magnitude of vector B. The angle between A and B is -

                               

1. 120°

2.  150°

3.  135°

4.  None of these

Subtopic:  Resultant of Vectors |
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The three vectors OA, OB and OC have the same magnitude R. Then the sum of these vectors have magnitude -

                       

1. R

2. 2R

3. 3R

4. 1+2R

Subtopic:  Resultant of Vectors |
 64%
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A truck travelling due north with 20m/s turns towards west and travels at the same speed. Then the change in velocity is -

(1)  40 m/s north-west

(2)  202 m/s north-west

(3)  40 m/s south-west

(4)  202 m/s south-west

Subtopic:  Resultant of Vectors |
 54%
From NCERT
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A particle is moving in a circle of radius r centered at O with constant speed v. The change in velocity moving from A to B AOB=40° is -

(A)  2v cos 40°

(B)  2v sin 40°

(C)  2v cos 20°

(D)  2v sin 20°

Subtopic:  Resultant of Vectors |
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What is the resultant of three coplanar forces: 300 N at 0°400 N at 30° and 400 N at 150°?

1.  500 N

2.  700 N

3.  1100 N

4.  300 N

Subtopic:  Resultant of Vectors |
 53%
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Two forces, F1 and F2 are acting on a body. One force is doubled of the other force and the resultant is equal to the greater force. Then the angle between the two forces is -

(A)  cos-1 1/2

(B)  cos-1 -1/2

(C)  cos-1 -1/4

(D)  cos-1 1/4

Subtopic:  Resultant of Vectors |
 60%
From NCERT
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