A young girl sits atthe edge of a dock by the bay, dipping her feet in the water. At the i...

A young girl sits atthe edge of a dock by the bay, dipping her feet in the water. At the instant shown in, she holds her lower leg stationary with her quadriceps muscle at an angle of 39° with respect to the horizontal. Use the information given in the figure, plus the fact that her lower leg has a mass of 3.4 kg, to determine the magnitude of the force, F q, exerted on the lower leg by the quadriceps.

FIGURE