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2.Motion in Straight Line
easy
A packet is dropped from a balloon which is going upwards with the velocity $12 \,m/s$, the velocity of the packet after $2$ seconds will be........$m/s$
A
$-12$
B
$12$
C
$-7.6$
D
$7.6$
Solution
(c) When packet is released from the balloon, it acquires the velocity of balloon of value $12 \,m/s$. Hence velocity of packet after $2$ sec, will be
$v = u + gt$$ = 12 – 9.8 \times 2 = -7.6 \,m/s$.
Standard 11
Physics