2. A powerful experimental sewing machine is powered by a mass-spring system. This sewing machine is capable of stitching 1,500 stiches in one minute.
a. How many stitches can this machine stitch is one second?
i. This is a measure of the sewing machine’s period or frequency?
b. If the sewing machine has a spring constant of 0.5 N/m, how large is the mass
that powers the oscillation motion of the machine? (Don’t forget to find T first)
Knowns Unknowns Formula

5points ! is potential chemical energy always transformed into kinetic

Infrared rays have a shorter wavelength than question 11 options: x-rays. ultraviolet rays. radio waves. gamma rays.

Wo small variable-thrust jets are actuated to keep the spacecraft angular velocity about the z-axis constant at ? 0 = 1.16 rad/s as the two telescoping booms are extended from r1 = 1.18 m to r2 = 4.69 m at a constant rate over a period of 124 seconds. the small 19-kg experiment modules at the ends of the booms may be treated as particles, and the mass of the rigid booms is negligible. determine the necessary thrust t for each jet as a function of time where t = 0 is the time when the telescoping action is begun. after you have the general expression for t, answer the questions. show work.