Question

centre of mass and gravity formula for cube pyramid cylinder sphere hollow sphere Semi circulars disc circular disc rod and triangle​

Answer 1

Solution

verified

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In all the four cases, as the mass density is uniform, centre of mass is located at their respective geometrical centres.

i) Sphere - Centre of Sphere

ii) Cylinder - Middle Point on axis of cylinder

iii) Ring - At centre of ring (Outside the ring)

iv) Cube - At point of intersection of diagnols

No, it is not necessary that the centre of mass of a body should lie on the body. For example, in case of a circular ring, centre of mass is at the centre of the ring, where there is no mass.