KinematicsHard

Question

A stone is projected vertically up from the bottom of a water tank. Assuming no water resistance it will go up & come down in same time but if water drag is present then the time it takes to takes to go up, tup and the time it takes to come down, tdown are releted as
       

Options

A.tup > tdown
B.tup = tdown
C.tup < tdown
D.Can not say

Solution

While moving up
     

& while moving down
     
∴     aup > adown

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