A1000-kg car travels along a straight portion of highway at a constant velocity of 10 m/s, due east. the car then encounters an unbanked curve of radius 50 m. the car follows the curve traveling at a constant speed of 10 m/s while the direction of the car changes from east to south. what is the magnitude of the frictional force between the tires and the road as the car negotiates the unbanked curve?

An air standard cycle with variable specific heats is executed in a closed system and is composed of the following four processes. 1-2 isentropic compression 100 kpa and 22°c to 600 kpa 2-3 v=constant heat addition to 1500 k 3-4 isentropic expansion to 100 kpa 4-1 p=constant heat rejection to initial state (a) show the cycle on p-v and t-s s (b) calculate the net work output per unit mass (409 kj/kg) (c) determine the thermal efficiency (47.9%)