1. The problem statement, all variables and given/known data A 15,000 kg helicopter lifts a 4500 kg truck with an upward acceleration of 1.4 m/s2. Calculate (a) the net upward force on the helicopter blades from the air and (b) the tension in the cable between helicopter and truck. 2. Relevant equations T = mg 3. The attempt at a solution I was able to calculate the upward force, but I am having difficulty finding out how to calculate the tension. I know that the truck is pulling the heli with the force of gravity, and the helicopter is pulling the truck with the upward force. But how do I relate the two?