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biomechanics 341 ch 14

Terms in this set (26)

Choose the term that describes an inertial property for rotation bodies representing resistance to angular acceleration.
moment of inertia
Which of the following variables contribute to moment of inertia?
m and k
Choose the term that describes the distance from the axis of rotation to a point where the body's mass could be concentrated without altering its rotational characteristics.
radius of gyration
Which of the following accurately describes the radius of gyration of the forearm segment?
greater w respect to the wrist than w respect to the elbow
If both bats A and B have the same mass, which bat is more difficult to swing and why?
bat a bc the weight ring on it is positioned farther from the axis of rotation
What effect does "choking up" on a bat have?
reduces moment of inertia
increases angular velocity of swing
Why is a bat easier to swing if you grip the barrel instead of the handle?
k is reduced
When knee flexion is increased, what happens to the moment of inertia of the leg about the hip?
increased
Regarding moment of inertia of the leg with respect to the hip, which of the following leg morphologies would favor a sprinter?
massive thighs and slimmer lower legs
Which is of importance to performance capability in gymnastic events?
ratio of muscular strength to segmental moments of inertia
Which of the following is referred to as the "quantity of angular motion" possessed by a body?
angular momentum
Which of the following is/are accurate formula(s) for angular momentum?
H=Iw
H=mk2w
Factors that affect the magnitude of a body's angular momentum include all EXCEPT
linear velocity
angular acceleration
What variable has the greatest effect on the body's angular momentum?
...
If a diver goes from a full layout position to a tuck position, what will happen to her angular velocity?
increase
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