Click to Chat

1800-2000-838

+91-120-4616500

CART 0

• 0

MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping

1]If A = B+C and the magnitude of A, B and C are 5,4,3 unit, the angle between A and B is :

(a)cos-13/5                          (b) cos-14/5

(c)π/2                                    (d) sin-1 3/5

2] Unit vector parallel to the resultant of vectors 4i – 3j and 8i + 8j and 8i + 8j will be:

(a) (24i+5j)/13                   (b) (12i+5j)/13

(c) (6i+5j)/13                      (d) none of these

3] A force of 6 N and another of 8 N can be applied together to produce the effect of a single force of:

(a) 1 N                   (b) 11 N

(c) 15 N                 (d) 20 N

4] Two vectors having equal magnitudes A make an angle ? with each other. The magnitude and direction of the resultant are respectively:

(a) 2Acos ? /2, along bisector

(b) A cos ?/2, at 45 from one vector

(c) A cos ?/2, along bisector

(d) A sin ?/2, along bisector

7 years ago

419 Points

Dear Anand

1. A-B=C square both sides

25+ 16-40 cos@=9  , cos@=32/40 = 4/5 ans b

2. resultant vector sum of all three = 20i + 13j  hence d

3. resultant square= 36 + 64 + 96 cos@= 100 + 96 cos@ range 4 to 196

resultant 2 to 16 answer b

4. R2= 2A2 + 2A2 COS@= 2A2 (1+COS@)=2A2 2COS2@/2

R= 2ACOS@/2 option a

All the best.

AKASH GOYAL

Please feel free to post as many doubts on our discussion forum as you can. We are all IITians and here to help you in your IIT JEE preparation.

Win exciting gifts by answering the questions on Discussion Forum. So help discuss any query on askiitians forum and become an Elite Expert League askiitian.

7 years ago
Think You Can Provide A Better Answer ?

## Other Related Questions on Vectors

View all Questions »
• Complete JEE Main/Advanced Course and Test Series
• OFFERED PRICE: Rs. 15,900
• View Details
Get extra Rs. 2,900 off
USE CODE: CHENNA
• Statistics and Probability
• OFFERED PRICE: Rs. 636
• View Details
Get extra Rs. 636 off
USE CODE: CHENNA