Imagine yourself standing in an elevator which is moving with an upward acceleration a=2m/s2 .A coin is dropped from rest from the roof of the elevator, relative to you.The roof to floor height of the elevator is 1.5 m. (Take g=10m/s2). rind the velocity of the coin relative to you when it strikes the base of the elevator.
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a
3 m/s
b
6 m/s
c
2 m/s
d
1.5 m/s
answer is B.
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Detailed Solution
Using vr2=ur2+2ars,ur=0ar=g−(−a)=(g+a)vr2=0+2(g+a)⋅hv=2(g+a)h=2×12×1.5=6m/s