Question

Fluctuations of which of the following bodies will be free: a) a piston in the engine cylinder, b) a needle of a sewing machine, c) a branch of a tree after a bird flew off it, d) a string of a musical instrument, e) the end of the compass hand; f) membrane of a phone during a conversation; g) a cup of a lever balance?

Answer 1

Here is an answer for you Mechanics question:
a) no, the oscillation is forced;
b) no, the oscillation is forced;
c) yes, the oscillations are free;
d) yes, the oscillations are free;
e) yes, the oscillations are free;
f) no, the oscillation is forced;
g) yes, the oscillations are free.