1. The problem statement, all variables and given/known data Find the Acceleration of a vehicle at 3k rpm and 5k rpm. At 3k the engine produces 65hp. At 5k it produces 155hp. Car weight is 1000kg. The wheels are 50cm in diameter. The engine is connected to the wheel via 2:1 ratio transmission. Neglect any losses. 2. Relevant equations kW = HP*0.7457 Nm (torque) = (kW*9550)/RPM Total Newtons =Nm*(Gear ratio) / Tire Radius in meters Acceleration: MA = F ... Total Newtons / Car weight. 3. The attempt at a solution kW = 65*.7457 = 48kW 48*9550/3000 = 154Nm (torque at 3k rpm) 154Nm*2/.25m = 1232N MA= F... F/M = A 1232N / 1000 = 1.232MS^2 but for some reason that doesnt seem right. Others are getting different results so i'm not sure whos wrong. The 5k is the same formulas so no point of posting that as well. Thanks for reading.