Why do skilled high jumpers lower their COM on the last step?
A. to increase time of support between foot and ground
B. to increase vertical velocity at take-off
C. to increase impulse at take-off
D. both A and B
E. all of the above
E. all of the above
You might also like to view...
The cells that respond to environmental stimuli are ________.
Fill in the blank(s) with the appropriate word(s).
The cornea:
a. is the colored part of the eye b. produces tears c. is the mucous covering of the eye d. is the clear part of the sclera in the front of the eye
ECGs
A) are most useful in diagnosing heart murmurs. B) show the summed electrical potentials generated by all cells of the heart. C) have two major components: waves and nodes. D) provide direct information about the heart function. E) measure the mechanical activity of the heart.
A sustained muscle contraction is known as
A. tetanus B. tone C. treppe D. twitch E. paralysis