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QJEEM21Ph9895: JEE Main 2021 Physics - Class 11 JEEM21Ph9895 Solution: Water drops are falling from a nozzle of a shower onto the…

Water drops are falling from a nozzle of a shower onto the floor, from a height of 9.8 m. The drops fall at a regular interval of time. When the first drop strikes the floor, at that instant, the third drop begins to fall. Locate the position of second drop from the floor when the first drop strikes the floor.

Multiple Choice Options

  • A 4.18 m
  • B 2.94 m
  • C 2.45 m
  • D 7.35 m

Step-by-Step Verified Solution

JEE Main 2021 (Online) 27th August Evening Shift Physics - Motion in a Straight Line Question 57 English Explanation
H = 12gt2

9.8×29.8 = t2

t = 2 sec

Δt : time interval between drops

h = 12g(2 − 2Δt)2

Δt = 12

h = 12g(2−12)2=12×9.8×12=9.84=2.45 m

H − h = 9.8 − 2.45

= 7.35 m

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