Asked by Jessica

A car with mass of 1045 kg speeds up to 74 km/h until reaching the top of hill in 50 s and covered distance of 680 m. The slope of the hill is 14.5 % grading. Given that the frontal area of the car, Af=2.62 m2, air density, ρ=1.2 kg/m3 and drag coefficient is 0.45. Take g=9.8 m/s2, determine
A. Gradient Resistance, Rg
B. RollingResistance,Rrl
C. Aerodynamic Resistance, Ra [1 mark] D. Inertia, F
E. Tractive Resistance/Effort