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
two particles P and Q start simultaneously from a point A with velocities 15 m/s and 20 m/s.the accelaration of both the bodies are equal in magnitude but opposite in direction.at point B velocity of P is 30m/s.find d velocity of Q at point B?
(sir if we apply first equation of motion answer is coming 5 m/s,if we apply 3rd equation answer is imaginary,if we solve by average velocity method(because displacement and time both are equal for btoh the bodies) answer is coming 25m/s......which one should we accept?? )
Since you get an imaginary answer, the given question has to be wrong. It is physically not possible with the given numbers.
Hi Ayush,
The first thing you must note is that P & Q will not reach point B simultaneously. (As a matter of fact one must verify if Q can reach point B).
At B velocity of P is 30m/s.
You can also check that Q will never reach point B. (When velocity of Q becomes 0, use 3rd law of motion).
You can see that, 0^2 - 20^2 = -2ax
And for P, let displacement is y. So 30^2 - 15^2 = 2ay. See that y>x. Hence Q will never reach the point B.
Regards,
Ashwin (IIT Madras).
f1st one is correct.........u have to rule out the 3rd equation method as the answer is imaginary..which cant be accepted
first one
Get your questions answered by the expert for free
You will get reply from our expert in sometime.
We will notify you when Our expert answers your question. To View your Question
Win Gift vouchers upto Rs 500/-
Register Yourself for a FREE Demo Class by Top IITians & Medical Experts Today !