1.

The moment of inertia of disc about its diameter is 2 units. Its moment of inertia about an axis through a point on its rim and in the plane of the disc is.

Answer»

⛦Hᴇʀᴇ Is Yoᴜʀ Aɴsᴡᴇʀ⚑
▬▬▬▬▬▬▬▬▬▬▬▬☟

▶Let ‘r’ be the radius of the disc.

♦ Given,

MOMENT of inertia of the disc about PQ, IPQ
➾ 2 UNITS

➧ Moment of inertia of the disc about AB, IAB
➾ ½ Mr²


➧ We need the MI of the disc about RS or IRS.

♦ Now

➧ From theorem of perpendicular axes,

IAB = 2IPQ

➾ ½ Mr² = 2

➾ Mr² = 4

➧ Now, by theorem of PARALLEL axes
IRS

➾ IPQ + Mr²
➾ 2 + 4
➾ 6 units ...✔

_________
Thanks...✊



Discussion

No Comment Found

Related InterviewSolutions