KinematicsHard

Question

Drops of water fall from the roof a building 9 m. high at regular intervals of time, the first drop reaching the ground at the same instant fourth drop starts to fall What are the distance of the second and third drops the roof ?

Options

A.6 m and 2 m
B.6 m and 3 m
C.4 m and 1 m
D.4 m and 2 m

Solution


9 = 0 + × (3t)2
= 3t

x2 = × 10 × (2t)2 = 20t2 = 20 × = 4m

x3 = × 10 × (t)2 = 5t2 = 5 × = 1m


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