A person is doing leg lifts with 3.00-kg ankle weights. the lower leg itself has a mass of 5.00 kg. when the leg is held still at an angle of 30.0° with respect to the horizontal, the patellar tendon pulls on the tibia with a force of 324 n at an angle of 20.0° with respect to the lower leg. assume the force exerted on the tibia by the femur is the only other significant force acting on the lower leg.
