Question

Q 10. A body goes from P to Q with a velocity of 40 ms -1 and comes back from Q toP with a velocity of 60 ms -1. What is the average velocity of the body during thejourney?th​

Answer 1

Answer:

Average velocity is zero as net displacement is zero i.e. its initial and final destinations are same .

I hope it helps .

Answer 2

Let distance bw P&Q ===> s


avg velocity = total displacement / total time
avg velocity will be zero , as the object reaches back to its initial position .


however avg speed = total distance / total time


total distance = 2s

time for p to q = t1
t = distance /speed
t1 = s/40

similarly t2 = s/60


avg speed = 2s / s/60 +s/40

after solving u would get 2/1/60 + 1/40
====> 2x 240 / 100 = 480/100 ===> 48 m/s


hope this helps

( recheck the calculations , i havent worked them out in paper , not very sure )