Often an unbalance of forces is produced in rotary or reciprocating machinery due to the ______
A. Centripetal forces
B. Centrifugal forces
C. Friction forces
D. Inertia forces
Answer:D
Often an unbalance of forces is produced in rotary or reciprocating machinery due to the ______
A. Centripetal forces B. Centrifugal forces C. Friction forces D. Inertia forces