Consider a circular disc of radius 20 cm with centre located at the origin. A circular hole of radius 5 cm is cut from this disc in such a way that the edge of the hole touches the edge of the disc. T

Question

Consider a circular disc of radius 20 cm with centre located at the origin. A circular hole of radius 5 cm is cut from this disc in such a way that the edge of the hole touches the edge of the disc. The distance of centre of mass of residual or remaining disc from the origin will be

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Answer:

C

Solution:

$mass of disc = m$ $mass of cut part = \frac{m}{16}$ $X_{co m} = \frac{m \times 0 - \frac{m}{16} \times 15}{m - \frac{m}{16}}$ $= 1 cm .$

TestHub · Accepted Answer

mass of disc = m mass of cut part = 16 m ​ X co m ​ = m − 16 m ​ m × 0 − 16 m ​ × 15 ​ = 1 cm .

Physics - Center of Mass Question with Solution | TestHub

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