The patellar tendon attaches to the tibia at the tibial tuberosity. The tibial tuberosity is 0.09 m from the center of the knee joint. The patellar tendon pulls at an angle of 27o to a line passing through the tibial tuberosity and the center of the knee joint. If the patellar tendon produces an extension torque around the knee joint equal to 438 Nm, how much force from the patellar tendon is lost or wasted (parallel to the knee joint) ?