Theory of Machine
The velocity of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by

ωR cosθ
ω(R - r₁) cosθ
ωr₁ sinθ
ω(R - r₁) sinθ

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Theory of Machine
Which of the following statement is correct as regard to the difference between a machine and a structure?

A machine transforms the available energy into some useful work, whereas in a structure no energy is transformed into useful work
The links of a machine may transmit both power and motion, whereas the members of a structure transmit forces only
The parts of a machine move relative to one another, whereas the members of a structure do not move relative to one another
All of these

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