A) On the way up \[{{a}_{y}}>0,\]on the way down\[{{a}_{y}}>0\]
B) On the way up \[{{a}_{y}}>0,\] on the way down\[{{a}_{y}}<0,\]
C) On the way up \[{{a}_{y}}<0,\] on the way down\[{{a}_{y}}>0\]
D) On the way up \[{{a}_{y}}<0,\] on the way down\[{{a}_{y}}<0\]
Correct Answer: D
Solution :
Since, acceleration acting on ball is only due to gravity, it would be in vertical downward direction and hence \[{{a}_{y}}<0\]for going up as well as when it is coming down. So, \[{{a}_{y}}<0\] for both.
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