First slide
Position Path Length (Distance) And Displacement
Question

A body falls from a height h =200 m (at New Delhi). The ratio of distances travelled in each 2 sec during t = 0 to t = 6 sec of the journey is

Moderate
Solution

We know that s=ut+12gt2
Here, s=12gt2 (u=0)
Now, 
s6=12g(6)2=18gs4=12g(4)2=8g
Now 
s1 =s2 -so = 29'
s2 =s4 -s2 =(8 g -2g)=6 g
s3 =s6-s4 =(18g-8S)=10 g
s1 : s2 : s3 =2g:6g:10 g=1:3:5

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