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A disc of mass  and radius  can rotate freely in a vertical plane about a horizontal axis at  distance  from the centre of the disc as shown in Figure. The disc is released from rest in the shown position. Answer the following questions based on the above information

The angular acceleration of the disc when  rotates by an angle of  is

a)

b)

c)

d)



Question ID - 101359 | SaraNextGen Top Answer

A disc of mass  and radius  can rotate freely in a vertical plane about a horizontal axis at  distance  from the centre of the disc as shown in Figure. The disc is released from rest in the shown position. Answer the following questions based on the above information

The angular acceleration of the disc when  rotates by an angle of  is

a)

b)

c)

d)

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

(a)

From ,

From energy conservation,

For FBD of the disc,

127 votes


127