JEE Main 2021PhysicsMotion In One DimensionMediumMCQ

JEE Main 2021 — Motion In One Dimension Question with Solution

JEE Main 2021 (25 Jul Shift 1)

Question

Water droplets are coming from an open tap at a particular rate. The spacing between a droplet observed at 4th second after its fall to the next droplet is 34.3 m. At what rate the droplets are coming from the tap ? (Take g=9.8 m s-2)

Choose an option

Show full solutionCorrect option: C
Correct answer
C1 drop/second

Step-by-step explanation

In 4th sec, 1st drop will travel 

⇒12×9.8×42=78.4 m

∴ 2nd drop would have travelled

⇒78.4-34.3=44.1 m

Time for 2nd drop

129.8t2=44.1

t=3 sec

∴ Each drop have time gap of 1 sec.

∴ 1 drop per second.

Practice this on the real CBT interface

Solve this JEE Main question (and the rest of the Motion In One Dimension chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.

Solve interactively →

About this question

This is a previous-year question from JEE Main 2021, covering the Motion In One Dimension chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.