Question

The human head weighs 4.8 kg and its center of mas 1.8 cm in front of the spinal column joint. If the trapezius muscle inserts 1.1 cm behind the spinal cord joint, how much downward force does it need to exert in order to maintain equilibrium

Answer 1

Answer:

The downward force does it need to exert in order to maintain equilibrium is 76.974 N

Explanation:

The downward force does it need to exert in order to maintain equilibrium is:

$F=\frac{mgL}{x}$

Where

m = mass of human head = 4.8 kg

g = gravity = 9.8 m/s²

L = center of mass = 1.8 cm = 0.018 m

x = distance = 1.1 cm = 0.011 m

Replacing:

$F=\frac{4.8*9.8*0.018}{0.011} =76.974N$

Answer 2

Answer:

77.05N of force

Explanation:

Detailed explanation and calculation is shown in the image below