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course Phy 231
I have completed these experiments 27 through 32. I watched the associated videos and set up and conducted the experiments indicated.
Experiment 27: The rotational effect of a force applied at a distance r from a point rotation is equal to the product of the force component perpendicular to a line from the point rotation to the point of application of the force and the distance r.Experiment 28: When a beam initially at rest, constrained to rotate in a horizontal plane about a fixed point, is accelerated by a horizontal force F, acting perpendicular to the beam, through displacement `ds, the angular velocity attained by the beam is proportional to the square root of F * `ds.
Experiment 29: When a weight attached by a thread around the horizontal axle of a rotating disk falls, the average velocity of the falling weight is proportional to the average angular velocity of the disk.
Experiment 30: When a change in the angular velocity of a disk is the result of a changing gravitational or elastic potential energy, the change in the total kinetic energy of the rotating disk is equal and opposite to the potential energy change.
Experiment 31: The harmonic motion of a pendulum or weight on a spring can be modeled with great precision by the appropriate coordinate of a point moving at constant velocity around a circle of appropriate radius.
Experiment 32: The total of the potential and kinetic energies of a simple pendulum whose amplitude is much less than its length is very nearly constant."
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