A food packet is dropped from a helicopter rising up with a velocity of 4m/s. The velocity of the packet after 3sec will be……..
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a
25.4 m/s
b
20.4 m/s
c
28.4 m/s
d
30.4 m/s
answer is A.
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Detailed Solution
The food packet is initially moving upwards with the velocity of helicopter.∴v=u−gt=4−9.8×3=4−29.4=−25.4m/s(negative sign shows that it is moving down)