A) 4.9 m
B) 9.8 m
C) 19.8 m
D) 24.7 m
Correct Answer: B
Solution :
Speed of stone in a vertically upward direction is 4.9 m/s. So for vertical downward motion we will consider \[u=-4.9\ m/s\] \[h=ut+\frac{1}{2}g{{t}^{2}}=-4.9\times 2+\frac{1}{2}\times 9.8\times {{(2)}^{2}}\]\[=9.8\ m\]
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