Answer: The flea is in the air for 0.657 seconds.
Explanation: Use the equation:
V² = U² + 2*a*s
0 = U² +2*(-9.8)*0.53
0= U² - 10.338
U² = 10.338
U = 3.22m/s
Initial velocity = 3.22 m/s
For part B:
s = ut + ½*a*t³
0 = 3.22t + (-4.9)t²
0 = 3.22t -4.9t²
4.9t² -3.22t = 0
t( 4.9t-3.22) = 0
t = 0 or t= 0.657 seconds.
