Q87 / 90 · JEE Main 2019 (08 Apr Shift 2) · Physics

A solid sphere and solid cylinder of identical radii approach an incline with the same linear velocity (see figure). Both roll without slipping all throughout. The two climb maximum heights hsph and hcyl on the inline. The ratio hsphhcyl  is given by:
Figure

  • A
    25
  • B
    45
  • Correct answer
    C
    1415
  • D
    1

Solution

From conservation of mechanical energy,
For solid sphere: 12msphV2+12Isphω2=msphghsph
V22+V25=ghsph 
7V210=ghsph …(i)
For cylinder: 12mcylV2+12Icylω2=mcylghcyl
V22+V24=ghcyl
3V24=ghcyl …(ii)
From (i) and (ii) hsphhcyl=1415

Hence, the correct answer is option: 'C'.

Relevant Questions