The distance by a body falling freely from the rest in 2nd,3rd and 5th second its motion are in the ratio
a) 7:5:3
b) 3:5:7
c) 5:3:7
d) 5:7:3
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» We know that
St = u + 1/2a ( 2t-t)
where t = 2,3,5 and u = 0
S2 = 1/2×10(4-1) = 15
S3 = 1/2×10(6-1) = 25
S5 = 1/2×10(10-1) = 45
Therefore, S2:S3:S5 = 3:5:9
No Option Matches
St = u + 1/2a ( 2t-t)
where t = 2,3,5 and u = 0
S2 = 1/2×10(4-1) = 15
S3 = 1/2×10(6-1) = 25
S5 = 1/2×10(10-1) = 45
Therefore, S2:S3:S5 = 3:5:9
No Option Matches
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