The data is collected from the middle of a weightlifting movement where an 80 kg weightlifter had
Question:
The data is collected from the middle of a weightlifting movement where an 80 kg weightlifter had +6 N horizontal and +1041 N vertical ground reaction forces acting on them. Utilize the data below and Dempter’s body segment parameters to determine the joint reaction forces in both x and y and the joint moments for the ankle, knee and hip. Show ALL work.
Location of landmarks
Landmarks | x (m) | y (m) |
Hip | 0.26 | 0.77 |
Knee | 0.02 | 0.50 |
Ankle | 0.10 | 0.12 |
Metatarsals | 0.00 | 0.03 |
COP | 0.00 | 0.00 |
Segmental kinematics
Segment | ax (m/s2) | ay (m/s2) | α (rad/s2) |
Thigh | 2.34 | -1.96 | 0.32 |
Shank | 1.56 | -1.64 | -9.39 |
Foot | -0.36 | -0.56 | -3.41 |
Segment Lengths
Segment | Length (m) |
Thigh | 0.361 |
Shank | 0.388 |
Foot | 0.135 |
Vector Mechanics for Engineers Statics and Dynamics
ISBN: 978-0073212227
8th Edition
Authors: Ferdinand Beer, E. Russell Johnston, Jr., Elliot Eisenberg, William Clausen, David Mazurek, Phillip Cornwell