A young girl sits at the edge of a dock by the bay, dipping her feet in the water. At the instant shown in the figure , she holds her lower leg stationary with her quadriceps muscle at an angle of 39 degree with respect to the horizontal.
Use the information given in the figure, plus the fact that her lower leg has a mass of 3.3 kg, to determine the magnitude of the force, F, exerted on the lower leg by the quadriceps.
1 answer
F = (3.3 kg)(9.8 m/s^2)sin(39°) = 28.9 N
2 answers