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Motion in A Straight Line question

2020 · 5 Sep · Shift 1 · Q47
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  5. /2020 · 5 Sep · Shift 1 · Q47

Motion in A Straight Line question

2020 · 5 Sep · Shift 1 · Q47

JEE MainPhysicsMotion in A Straight LineMCQ+4 / −1
A helicopter rises from rest on the ground vertically upwards with a constant acceleration g. A food packet is dropped from the helicopter when it is at a height h. The time taken by the packet to reach the ground is close to : [g is the acceleration due to gravity]
  1. A
    t = 3.4 (hg)\sqrt {\left( {{h \over g}} \right)}(gh​)​
  2. B
    t = 1.8 (hg)\sqrt {\left( {{h \over g}} \right)}(gh​)​
  3. C
    t = 2h3g\sqrt {{{2h} \over {3g}}}3g2h​​
  4. D
    t = 23(hg){2 \over 3}\sqrt {\left( {{h \over g}} \right)}32​(gh​)​
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