Consider a lunar rover of mass m = 200 kg traveling at constant speed over a semicircular hill of radius rho = 100 m. The acceleration due to gravity on 2 the moon is g = 1.6 m/s . How fast can the rover travel without leaving the moon’s surface anywhere on the hill?

Why is there friction between objects

Ammonia enters the expansion valve of a refrigeration system at a pressure of 10 bar and a temperature of 18oc and exits at 6.0 bar. the refrigerant undergoes a throttling process. determine the temperature, in oc, and the quality of the refrigerant at the exit of the expansion valve.

Which sound characteristic is not affected by the relative motion of an object