:grumpy: A 7850 kg helicopter accelerates upward at 0.545 m/s^2 while lifting a 1250 kg car. What is the lift force exerted by the air on the rotors? What is the tension in the cable ignoring its mass that connects the car to the helicopter? Net Force = ma, so I did (7850)(0.545) + (1250)(0.545) = 4959.5 N but that answer is incorrect and I know if I don't have the right answer for the first one I will not be able to solve the second one. Would appreciate someone's assistance, thank you.