Questions
A balloon of weight w is falling vertically downward with a constant acceleration a (< g). The magnitude
of the air resistance is
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a
ω
b
w1+ag
c
w1-ag
d
wag
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Correct option is C
Suppose air resistance is F (upwards), then from equation of motion of balloon, we haveF'= Mass × Acceleration =wg·a∴ F=w-F'=w1-agSimilar Questions
A light spring balance hangs from the hook of the other light balance and a block of mass M kg hangs from the former one. Then the true statement about the scale reading is
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