Hey there! We receieved your request
Stay Tuned as we are going to contact you within 1 Hour
One of our academic counsellors will contact you within 1 working day.
Click to Chat
1800-5470-145
+91 7353221155
Use Coupon: CART20 and get 20% off on all online Study Material
Complete Your Registration (Step 2 of 2 )
Sit and relax as our customer representative will contact you within 1 business day
OTP to be sent to Change
The resultant of 2 vectors A & B is at right angles to vector A and its magnitude is half of vector B. Find the angle between vectors A & B ?
let the vectors be A and B and the resultant be R and their magnitides be a,b,r and let angle btn A and b be x
so A + B = R
also b2 = a2+ r2 ( from figure )
as r = b/2 we have a = 0.86 b
also angle between A and R is 90 , so dot product is zero
A.R=0 or A.(A+B)=0
as A.A = a2.cos 0 = a2
so A.B = - a2
and A.B = a*b*cos x
so cos x = -a2 /ab = -0.86
x=150 degrees
--
Ramesh
Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today !