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JEE Main 20206 SeptemberEvening Shift

Exam: JEE Main
Year: 2020
Date: 6 September
Shift: Evening Shift
Subject: Physics
Chapter: Center of Mass, Momentum and Collision

JEE Main 2020 · 6 September · Evening Shift · Physics · Center of Mass, Momentum and Collision

The centre of mass of a solid hemisphere of radius 8cm is xcm from...

The centre of mass of a solid hemisphere of radius

8cm

is

xcm

from the centre of the flat surface. Then value of

x

is

Correct answer

3

Step-by-step solution

Centre of Mass of a solid hemisphere from centre of the flat surface is given by, ${h}_{cm} = \dfrac{3R}{8}$

It is given that $R = 8cm$

Therefore,

$x = {h}_{cm} = \dfrac{3R}{8} = \dfrac{3 \times 8}{8}x = 3cm$

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