Basic Biomechanics
7th Edition
ISBN: 9780073522760
Author: Susan J Hall
Publisher: McGraw-Hill Education
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Chapter 10, Problem 6AP
A Dallas Cowboy carrying the ball straight down the near sideline with a velocity of 8 m/s crosses the 50-yard line at the same time that the last Buffalo Bill who can possibly hope to catch him starts running from the 50-yard line at a point that is 13.7 m from the near sideline. What must the Bill’s velocity be if he is to catch the Cowboy just short of the goal line? (Answer: 8.35 m/s)
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Given the following ankle and knee coordinates calculate the partial internal knee angle to 1 decimal place
Ankle z 0.129 m
Ankle x 0.37 m
Knee z 0.409 m
Knee x 0.522 m
Answer:
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With the shoulder flexed at 30°, the moment arm of the deltoid muscle is 2.0 cm. Solve
for the force exerted by the deltoid muscle at the glenohumeral joint give the following
assumptions:
The deltoid is the only active muscle at the glenohumeral joint
The weight of the humerus is 48 N.
The center of gravity of the humerus is located 30 cm from the shoulder center of
rotation
STATIC EQUILIBRIUM EQUATIONS
CONSIDERING ONLY THE DELTOID MUSCLE
Fo
MA =
18 Cn
COR
B=55".
0-30°
RaF 30 cm
FG = 24 N
Using the above “mean-speed theorem”, calculate the average velocity of a car with constant acceleration from 0 km/hour (initial speed) to 80 km/hour (final speed) over a 5-minute period of time.
average velocity over 5 minutes = 16 kilometers/hour
average velocity over 5 minutes = 20 kilometers/hour
average velocity over 5 minutes = 24 kilometers/hour
average velocity over 5 minutes = 32 kilometers/hour
average velocity over 5 minutes = 40 kilometers/hour
Chapter 10 Solutions
Basic Biomechanics
Ch. 10 - A runner completes 6 laps around a 400 m track...Ch. 10 - A ball rolls with an acceleration of 0.5 m/s2. If...Ch. 10 - A wheelchair marathoner has a speed of 5 m/s after...Ch. 10 - An orienteer runs 400 m directly east and then 500...Ch. 10 - An orienteer runs north at 5 m/s for 120 s and...Ch. 10 - Why are the horizontal and vertical components of...Ch. 10 - A soccer ball is kicked with an initial horizontal...Ch. 10 - If a baseball, a basketball, and a 71.2-N shot...Ch. 10 - A tennis ball leaves a racket during the execution...Ch. 10 - Prob. 10IP
Ch. 10 - Answer the following questions pertaining to the...Ch. 10 - Provide a trigonometric solution for Introductory...Ch. 10 - Provide a trigonometric solution for Introductory...Ch. 10 - A buoy marking the turn in the ocean swim leg of a...Ch. 10 - A sailboat is being propelled westerly by the wind...Ch. 10 - A Dallas Cowboy carrying the ball straight down...Ch. 10 - A soccer ball is kicked from the playing field at...Ch. 10 - A ball is kicked a horizontal distance of 45.8 m....Ch. 10 - A badminton shuttlecock is struck by a racket at a...Ch. 10 - An archery arrow is shot with a speed of 45 m/s at...
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