A mass of 5 slug is attached to the end of a spring and then is connected to a motor that runs a driving force of f (t) = 2sin(2t) . If the spring constant is 20 lb/ft and mass is released 1 foot above equilibrium position at time t=0. Required:
a. Find the equation of motion if the mass is driven by an external force equal to f(t)=12cos2t+3sin2t.
b. Graph the transient and steady-state solutions on the same coordinate axes.
c. Graph the equation of motion.

Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.

Ahot wire operates at a temperature of 200°c while the air temperature is 20°c. the hot wire element is a tungsten wire of 5 um diameter and 2 mm in length. plot using excel current, heat transfer and heat generated by the wire for air velocity varying from 1-10 m/s in steps of lm/s? matlab the sensor voltage output, resistance, or assume nu 0.989 re033pr13 take air properties at tr (200°c20°c)/2 = 110°c properties of tungsten: c 0.13 kj/kg.k 3 p 19250 kg/m k (thermal conductivity) = 174 w/m.k