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Q.

A food packet is released from a helicopter rising steadily at the speed of 2m/sec. After 2 seconds the velocity of the packet is (g=10m/sec)2

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a

None of the above

b

20m/sec

c

22m/sec

d

18m/sec

answer is C.

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Detailed Solution

The food packet has an initial velocity of 2m/sec in upward direction, therefore

v=−u+gt orv=−2+10×2=18m/sec

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A food packet is released from a helicopter rising steadily at the speed of 2m/sec. After 2 seconds the velocity of the packet is (g=10m/sec)2