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1.2 A machine is a device that changes the direction or magnitude of a force, or changes the motion of an object.

where x is the displacement of the machine, c is the damping coefficient, and F0 is the amplitude of the external force.

where n is the number of links, f is the number of kinematic pairs, and h is the number of higher pairs.

where s is the displacement of the follower and θ is the angle of rotation of the cam.

3.3 The work-energy principle states that the net work done on a machine is equal to the change in kinetic energy:

ΣF = m × a

5.3 The equation of motion for a gear train can be written as:

s = f(θ)