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A disc of mass  and radius  is rolling with angular speed  on a horizontal plane as shown Figure. The magnitude of angular momentum of the disc about the origin  is

a)

b)

c)

d)



Question ID - 100727 | SaraNextGen Top Answer

A disc of mass  and radius  is rolling with angular speed  on a horizontal plane as shown Figure. The magnitude of angular momentum of the disc about the origin  is

a)

b)

c)

d)

1 Answer
127 votes
Answer Key / Explanation : (c) -

(c)

The disc has two types of motion, namely, translational and rotational. Therefore, there are two types of angular momentum and the total angular momentum is the sum of these two

angular momentum due to translational motion

angular momentum due to rotational motion about CM

about centre of mass

 in case of rolling motion and surface at rest)

127 votes


127