Laws Of Motion Question 235

Question: A lift accelerated downward with acceleration ‘a’. A man in the lift throws a ball upward with acceleration $ a _{0}(a _{0}<a). $ Then acceleration of ball observed by observer, which is on earth, is[AIEEE 2002]

Options:

A) $ (a+a _{0}) $ upward

B) $ (a-a _{0}) $ upward

C) $ (a+a _{0}) $ downward

D) $ (a-a _{0}) $ downward

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Answer:

Correct Answer: D

Solution:

The effective acceleration of ball observed by observer on earth = (a ? a0) As $ a _{0}<a, $ hence net acceleration is in downward direction.



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