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Rotational Mechanics — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsRotational Mechanics1 Mark
MCQ
A solid sphere, a hollow sphere and a disc, all having same mass and radius, are placed at the top of a smooth incline and released. Least time will be taken in reaching the bottom by:
  • A
    The solid sphere.
  • B
    The hollow sphere.
  • C
    The disc.
  • ✓
    All will take same time.
✓

Answer

Correct option: D.
All will take same time.
The incline is smooth; therefore, all bodies will slip on the incline. Also, as the mass of bodies is same, they will reach the bottom in equal time.

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