1. Explain in details with examples the following statement : "The balancing of rotating and reciprocating parts of an engine is necessary when it run sat high speeds". 2. Explain

in details with examples the following statement : “ In order to have a complete balance of the several revolving masses in different planes: both the resultant force and couple must be zero" 3. Explain clearly the terms 'static balancing' and 'dynamic balancing'. State the necessary conditions to achieve them. 4. Explain the method of balancing of different masses revolving in the same plane.