A disturbing mass m₁ attached to the rotating shaft may be balanced by a single mass m₂ attached in the same plane of rotation as that of m₁, such that (where r₁ and r₂ are the radii of rotation of m₁ and m₂ respectively)

A disturbing mass m₁ attached to the rotating shaft may be balanced

1.	A disturbing mass m₁ attached to the rotating shaft may be balanced by a single mass m₂ attached in the same plane of rotation as that of m₁, such that (where r₁ and r₂ are the radii of rotation of m₁ and m₂ respectively)
A.	m₁ r₂ = m₂ r₁
B.	m₁ r₁ = m₂ r₂
C.	m₁ m₂ = r₁ r₂
D.	None of these
Answer» C. m₁ m₂ = r₁ r₂

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A disturbing mass m₁ attached to the rotating shaft may be balanced by a single mass m₂ attached in the same plane of rotation as that of m₁, such that (where r₁ and r₂ are the radii of rotation of m₁ and m₂ respectively)

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