Torques and Moments of Force
What is the SI unit for torque?
Nm
What is the direction of the angular velocity of a shotputter if they are spinning in a clockwise direction prior to releasing the shot?
Negative
Name one movement that would raise your center of gravity?
Any upward movement (i.e., lifting arm up, getting on your tiptoes, etc.)
What is the primary plane of motion for an athlete performing squats?
Sagittal (median) plane
A baseball player swings a bat through 90° in 0.5 seconds. What happens to the average angular velocity if the same swing is completed in 0.25 seconds?
It doubles
A wrestler in a low, wide stance is manipulating his center of gravity to increase which of the following?
a. Power
b. Speed
c. Stability
d. Torque
c. Stability
How many degrees are in 17 radians?
974 degrees
While performing a backflip on a trampoline, around which axis is the person rotating?
Transverse axis
If the radius of gyration of an object increases, how does this affect its resistance to rotation?
It becomes more difficult to rotate
A gymnast brings in her arms and legs during a spin to increase her rotation. What happens to her angular velocity and moment of inertia?
Angular velocity increases, moment of inertia decreases
During a cartwheel, around which axis does the gymnast primarily rotate?
Anteroposterior axis