Q2/ A mass oscillates back and forth between two points A and B separated by (56 cm), while attached to a spring with spring constant (k = 245 N/m). It requires 0.250 s to travel from A to B (and 0.250 s to travel from B to A).
a) What are the period T, frequency f, and amplitude A of the motion? b) What total mechanical energy E is in the oscillations?
c) How large is the mass?

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.