A1800-kg jeep travels along a straight 500-m portion of highway (from a to b) at a constant speed of 10 m/s. at b, the jeep encounters an unbanked curve of radius 50 m. the jeep follows the road from b to c traveling at a constant speed of 10 m/s while the direction of the jeep changes from east to south. what is the magnitude of the frictional force between the tires and the road as the jeep negotiates the curve from b to c?

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.