Need 3 questions marked in red in doc answered correctly based on professor's feedback . My answers are incorrect for those. I need it in around 11 hours
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Explanation & Answer
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Open Book and Notes
Name: DOMINIC RONDINELLI
All parts in the question must be completed for you to receive full credit.
1. You’ve been invited to take part in a study in a biomechanics lab. The first thing you
are shown is the general setup of the lab, with force plates and cameras to record
every static and dynamic measurement.
a. What information can we record from the force plates?
Force plates are useful in recording information of ground reaction forces generated
by a body standing on or moving across. They can quantify balance, gait, and other
parameters of biomechanics.
b. You stand on one of the force plates so we can calibrate it before starting the
study. The plate measures 30 feet on each side. Let’s assume your weight is
180 pounds and you are standing 5 feet from Sensor A. One of the
researchers places 10-pound cube 15 feet from Sensor B. Solve for all torques
and forces from Sensor A and Sensor B.
Force on sensor A = Normal force from ground due to the person’s weight =
weight of the person = 180 pound-force
Force on sensor B = Normal force from ground due to the cube’s weight =
weight of the cube = 10 pound-force
Torque on sensor A = Force on sensor A × Distance from the man = 180 × 5 =
Toque on sensor B = Force on sensor B × Distance from the cube = 10 × 15 =
Forces in the horizontal plane are 0 for both sensors since there is no
horizontal shear stress (such as friction) being experienced in this case. All
forces are in the vertical direction.
c. What assumptions do we make for part b?