Q5 / 105 · NTA Abhyas (JEE Main) 2020 · Physics · Center of Mass Momentum and Collision

From a uniform solid cone of base radius R and height H, a symmetric cone of the base radius R2 is removed as shown. Then the centre of mass is shifted by Hn. Find the value of n.

Figure

Correct answer: 56

Solution

yCOM=m1y1-m2y2m1-m2          =M.H4-M8H8M-M8
           =15H56
Δy=15H56-H4      =H56

Hence, the correct answer is 56.

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