Questions
The ratio of time taken to cover 1st m, 2nd m, 3rd m distances in freely falling motion is
detailed solution
Correct option is A
time taken in free fall t=2hgequation of motion, S=ut+12gt2 initial velocity=U;acceleration due to gravity=g;time elapsed=t;displacement=S for freely falling body, S=0+12gt2 ⇒t=2hg time for displacement=S=1m is ts=1= 2(1)g=2g time for displacement=S=2m is ts=2= 2(2)g=2g2 time for displacement=S=3m is ts=3= 2(3)g=2g3 time for displacement=S=4m is ts=4= 2(4)g=2g4 time taken to 1st m=T1= ts=1- ts=0=2g-0=2g time taken to cover2nd m=T2= ts=2- ts=1=2g2-2g=2g(2-1) time taken to cover3rd m=T3= ts=3- ts=2=2g3-2g2=2g(3-2) time taken to cover 4th m=T4= ts=4- ts=3=2g4-2g3=2g(4-3) T1:T2:T3=2g:2g(2-1):2g(3-2):2g(4-3) T1:T2:T3=1:(2-1):(3-2):(4-3)=ratio of time taken for successive meter displacementt1:t2:t3=1:2−1:3−2Talk to our academic expert!
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