A mass M is connected to a spring with constant Ks and a dam…

A mass M is connected to a spring with constant Ks and a damper with constant Kd, and is moving with displacement x with friction Kf. Assume the input if the force f. Find the model of the following mass-spring-damper systems in the state space (find the matrices A). 

  The economy of the US is  and the value of national output…

  The economy of the US is  and the value of national output equals $ .  Determine the quantity of gross investment for equilibrium when  spending   equals $ , government purchases of goods and services equals $ , the difference between exports and imports equals $ , and the government decided to spend $ to purchase 5 made in     instead of 2 made in    . Calculate and enter the amount of gross investment for equilibrium.   Enter your answer as a whole number. Do not enter units. Do not enter “$”, commas, or decimals.