A) \[-12\text{ }m/s\]
B) 12 m/s
C) \[-7.6\text{ }m/s\]
D) 7.6 m/s
Correct Answer: C
Solution :
Given, Velocity of balloon \[u=12\text{ }m/s\] Time \[t=2\text{ }sec\] when the packet is released from the balloon it aquires the velocity of balloon it means initial velocity of the packet \[=12\text{ }m/s\] Hence, velocity after 2 sec is given by, \[v=u+at\] \[=12+(-9.8)\times 2\] \[=12-19.6=-7.6\text{ }m/s\] (minus sign is due to the motion is in opposite direction)
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