Often an unbalance of forces is produced in rotary or reciprocating machinery due to the
______ *
1 point
(A) Centripetal forces
(B) Centrifugal forces
(C) Friction forces
(D) Inertia forces
______ *
1 point
(A) Centripetal forces
(B) Centrifugal forces
(C) Friction forces
(D) Inertia forces