KinematicsHard
Question
A person drops from a building of height 20 m. same instant the front end of a tuck passes below the building moving with constant acceleration of 1 m/s2 and velocity of 2 m/s at that instant Length of the truck if the stone just misses to hit its rear part is : -
Options
A.6 m
B.4 m
C.5 m
D.2 m
Solution
Time of fall of stone = 
Horizontal displacement of truck is 2 sec
⇒ S = 2 × 2 +
× 1 × 4
Length of truck = 6m
Horizontal displacement of truck is 2 sec
⇒ S = 2 × 2 +
× 1 × 4Length of truck = 6m
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