Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 11-science Answered

Two equal vectors have thier resultant equal to either of them.At what angle are they inclined to each other?
Asked by satyapaldpr | 06 Aug, 2015, 08:01: PM
answered-by-expert Expert Answer
begin mathsize 14px style Let space the space two space vectors space be space straight P with rightwards arrow on top space and space straight Q with rightwards arrow on top space and space resultant space be space straight R with rightwards arrow on top According space to space the space given space condition comma open vertical bar straight P with bar on top close vertical bar equals open vertical bar straight Q with bar on top close vertical bar equals open vertical bar straight R with rightwards arrow on top close vertical bar equals open vertical bar straight S with rightwards arrow on top close vertical bar straight R equals square root of straight P squared plus straight Q squared plus 2 space PQ space cos space straight theta end root straight S equals square root of straight S squared plus straight S squared plus 2 space straight S cross times straight S space cos space straight theta end root straight S equals square root of 2 straight S squared plus 2 straight S squared space cos space straight theta end root straight S equals square root of 2 space straight S space square root of 1 plus cos space straight theta end root straight S squared equals 2 straight S squared left parenthesis 1 plus cos space straight theta right parenthesis left parenthesis 1 plus cos space right parenthesis equals 1 half cos space straight theta equals 1 half minus 1 cos space straight theta equals negative 1 half straight theta equals cos to the power of negative 1 end exponent open parentheses negative 1 half close parentheses rightwards double arrow straight theta equals 120 degree end style
Answered by Faiza Lambe | 07 Aug, 2015, 08:23: AM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 11-science - Physics
two forces whose magnitude are in the 3:5 give a resultant f Jatio 3:5 give 20 N. If fac 20. It fue angle of thread indination of each face find Magnitude
question image
Asked by vinitdubey7735 | 14 Mar, 2024, 11:21: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
please provide complete solution
question image
Asked by dhanshreekansyakar | 09 Jan, 2024, 11:57: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
A×B where A= 2i-3j-k and B =i+4j-2k
question image
Asked by banhisikhapanda49 | 07 Nov, 2023, 10:42: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
1.State paralogram law of vector addition and derive magnitude and the direction of a resultant vector  
Asked by preethiprithivi05 | 21 Feb, 2023, 09:28: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
What do your understatnd by (1)position vector and (ii) displancment vector. Distinguish them with illustration.
Asked by rk274268 | 05 Aug, 2022, 01:19: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
what is dot product
Asked by Kattaithihaas | 24 Jul, 2022, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
a boat's speed in still water is 20km/h .if the boat is to travel directly across a river whose current has a speed of 12km/h ,at what upstream angle must the boat head?
Asked by pawankumardas15492 | 22 Jul, 2022, 10:24: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
A particle is located at 5i^ +6j^ + 7k^ at t=0.. After 5 seconds, it is located at 2i^+5j^ +5k^. The magnitude of displacement of  the particle in XY plane is: ???
Asked by nutankumari95074 | 11 Jun, 2022, 05:24: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
if |A|=|B|=|A-B|, then find the angle b/w the two vectors
Asked by kaziryan.05 | 13 Apr, 2022, 09:01: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Physics
how to find component of vector ?
Asked by aditya000ghoderao | 19 Jan, 2022, 05:05: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×