Concept explainers
The relative angle at the knee changes from 0° to 85° during the knee flexion phase of a squat exercise. If 10 complete squats are performed, what is the total angular distance and the total angular displacement undergone at the knee? (Provide answers in both degrees and radians.) (Answer: ϕ = 1700°, 29.7 rad; θ = 0)
To determine: The angular distance and angular displacement at the Knee.
Answer to Problem 1IP
The total angular distance for 10 squats is
Explanation of Solution
Calculation:
The angular distance knee must travel for flexion is
Write the expression for angular distance.
Substitute
Therefore, total angular distance for 10 squats is
Convert the total angular distance for 10 squats into radian.
Therefore, the total angular distance for 10 squats in radian is
There is no change in position after completing 10 squats, thus, angular displacement is zero.
Therefore, total angular distance for 10 squats is
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Chapter 11 Solutions
BASIC BIOMECHANICS
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