Explain some of the environmental advantages and disadvantages of upward urban growth.

Achild has maximum walking speed of 1.6 m/s. what is the length of the child's legs? 0.26 m

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?

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.