Please calculate the hip extensor torque
required to hold the weights in a static condition.
The moment arm of the external and upper body weight is 0.3 m and
0.2 m, respectively, and F1 is the force of the
upper body (450 N) and F2 is the force of the
weight (600 N). What if we know th moment arm of the back extensors
is 0.04 m, what is the muscle force required to hold
the weight in this back squat position? Make sure to
show your work.