Verified Solution • 2025–26 Session moderate

QJEEM20Phcd75: JEE Main 2020 Physics - Class 11 JEEM20Phcd75 Solution: A particle is moving unidirectionally on a horizontal plane…

A particle is moving unidirectionally on a horizontal plane under the action of a constant power supplying energy source. The displacement (s) - time (t) graph that describes the motion of the particle is (graphs are drawn schematically and are not to scale) :

Multiple Choice Options

  • A https://ik.imagekit.io/novatra/photos/1d11c70518fe99bcb5f623511dfbc2a0bc6b95576253ceed04cf25705d07538f.webp
  • B https://ik.imagekit.io/novatra/photos/e6a85fee8f49b806bac5e9b73f1c6f4fcd671272bf0b17ae13582552f436078c.webp
  • C https://ik.imagekit.io/novatra/photos/ed2b9193cedba355f36bb70d96a47e8b2006639bcb568cfd91de808ea4161ee5.webp
  • D https://ik.imagekit.io/novatra/photos/65770054d94a31e35a46a00c05178d9e773c2f57fecbe9162688c192b72110a6.webp

Step-by-Step Verified Solution

P=Fv

P=mdvdtv

⇒ vdv=Pmdt

Integrating both sides, we get

V2=k′t

⇒ V = k"t

⇒ dsdt = k"t

⇒ ∫ds=∫k″tdt

⇒ s ∝ t3/2

Related Learning Resources & Exam Preparation

JEE Main PYQ Question Bank
Browse year-wise authentic previous years' questions with solutions
Authentic CBT Mock Tests
Simulate official exam environment with live timer and percentile scoring