45-51. The oriental rat flea, a major carrier of bubonic plague, can
jump a vertical distance more than 100 times its body length. (Imagine
if you could do that!) During the initial phase of the jump, the flea
is
in contact with the ground for a typical time of 1.2 ms, and has an
average
upward acceleration of 1.0 X 103 m/s2 (about 100
g).
The mass of an average oriental rat flea is 2.1 X 10-7 kg.
Neglect
air resistance.
(a) During the initial phase, of the jump, what is the magnitude of
the resultant force on the flea?
(b) Draw a FBD for the flea in (a). What object exerts the upward force
on the flea?
(c) After the flea has lost contact with the ground, what is the
resultant
force (magnitude and direction) on it?
(d) How high does the flea jump?
Then the work of Sir Isaac Newton was in vain!
Try again