Question

A solid homogeneous sphere of mass M and
radius R is moving on a rough horizontal surface,
partly rolling and partly sliding. During this kind
of motion of the sphere
(a) total kinetic energy is conserved
(b) the angular momentum of the sphere about
the point of contact with the plane is
conserved
(c) only the rotational kinetic energy about the
centre of mass is conserved
(d) angular momentum about the centre of mass
is conserved

Answer 1

Answer:

the answer is D angular momentum about the centre of mass is conserved

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