Question

If the vertical ground reaction force is greater than body
weight, which way is the center of gravity moving

Answer #1

Why
is the difference between the ground reaction force and the body
weight equivalent to the net force acting on the person?

At push-off phase during walking, the anterior/posterior ground
reaction force at the center of pressure is 157 N and the vertical
ground reaction force under the right foot is 293 N. The foot has a
length of 0.3 m and is 33 degrees above the ground. The center of
pressure is located under the metatarsal heads.
Calculate the moment arm for the anterior/posterior ground reaction
force. (m)
Calculate the moment arm for the vertical ground reaction force.
(m)
Calculate the...

Replace the weight of a body with a single concentrated force
acting through the body’s center of gravity
I just need an exemple

how
does speed and gender influence vertical ground reaction force
while jogging and running?

During a running stride, a person’s foot is on the ground and
the ground reaction force is 447 N in the x direction and 1324 N in
the y direction. The foot has a mass of 0.71 kg, a moment of
inertia of 0.414 kg m2, and is undergoing angular acceleration of
13.9 rad/s2. Its linear acceleration is 8.63 m/s2 in the x
direction and 3.19 m/s2 in the y direction. Relative to the center
of mass of the foot,...

When you walk normally, your front heel strikes the ground and
there is a force on your foot from the ground which is a vector sum
of normal force and friction force and is directed along your leg
as shown. For a regular walk, your leg makes an angle of 30° from
vertical and the normal force peaks at 1.1 times the body weight.
For a person with a mass of 65 kg:
a) What is the magnitude of the...

A body, weight W, is attached by a string,
length l, to a hook on a vertical wall. A horizontal force
F acting on the body holds it at a distance
d from the wall. Derive the equation which gives
the force F in terms of W,
l, and d.

8. We know that the mean weight of men is greater than the mean
weight of women, and the mean height of men is greater than the
mean height of women. A person’s body mass index (BMI) is computed
by dividing weight (kg) by the square of height (m). Use α = 0.05
significance level to test the claim that females and males have
the same mean BMI. Below are the statistics for random samples of
females and males. Female...

Which of the following statements is true about a body's center
of gravity:
a. It is the location of the area center
b. It is the point where the potential energy of a system is
minimal.
c. It is the point where the weight resulting from a system acts
in such a way that it generates the moment resulting from a
system.
d. It is the location where the moment resulting from a system
subject to symmetrical couplings acts.

In an old-fashioned rolling mill, grain is ground by a
disk-shaped millstone that rolls in a circle on a flat surface,
driven by a vertical shaft. Because of the stone's angular
momentum, the contact force with the surface is greater than the
weight of the wheel.
Assume that the millstone is a uniform disk of mass M, radius b,
and width w, and that it rolls without slipping in a circle of
radius R with angular velocity w. Find the...

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