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Questions  

A mango tree is at the bank of a river and one of the branch of tree extends over the river. A tortoise lives in the river. A mango falls just on the tortoise. The acceleration of the mango falling from tree as it appears to the tortoise is (refractive index of water is 4/3 and the tortoise is stationary) 

a
g
b
3g/4
c
4g/3
d
none of these

detailed solution

Correct option is C

x1=xrelμ⇒xrel=μx d2xreldt2=μd2xdt2 ⇒arel=μg=4g3

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