For which of the following does the cent...

For which of the following does the centre of mass lie outside the body ?

A pencil

A shotput

A dice

A bangle.

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The correct Answer is:

Centre of mass of a bangle (a circular ring) lies a its geometric centre, which lies outside the body. The correct option is (d).

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there is a rod AB of uniform cross section and its centre is C. In which of the following case(s) centre of mass of the rod may lie at C.

Density of the material of rod increases continuously from A to B.

Density of the material of rod increases continuously from B to A.

Density of the material of rod increases from A to C and then decreases from C to B

Density of the material of rod decreases from A to C and then increases from C to B.

Lies always at the geometrical centre

Lies always inside the body

Lies always outside the body

May lie within or outside the body.

depends on the choice of co - ordinate system

is independent of the choice of co - ordinate system .

may or may not depend on the choice of co - ordinate system

None of the above