Taian Wuyue Special Purpose Vehicle Co., Ltd. is a large-scale production base of special purpose vehicle. In the vehicle type test, a special purpose vehicle of this factory runs 5.6km on a straight road evenly, and the resistance is 30000N, which consumes fuel

Taian Wuyue Special Purpose Vehicle Co., Ltd. is a large-scale production base of special purpose vehicle. In the vehicle type test, a special purpose vehicle of this factory runs 5.6km on a straight road evenly, and the resistance is 30000N, which consumes fuel

(1) Because the special vehicle runs at a constant speed, the traction force F = f = 3.0 × 103n, the work done by the traction force w = FS = 3.0 × 103n × 5.6 × 103m = 1.68 × 107j (2) mass of fuel consumed: M = ρ v = 0.8 × 103kg / m3 × 1.5 × 10-3m3 = 1.2kg heat generated by complete combustion of fuel: q = MQ = 1.2kg × 4 × 107j / kg = 4.8 × 107j heat engine efficiency η = WQ = 1.68 × 107j 4.8 × 107j = 35%