Answer:
The mass of the bird is 1 [kg]
Explanation:
The kinetic energy is defined by the following equation:
[tex]E_{k} =\frac{1}{2} *m*v^{2}\\[/tex]
where:
m= mass of the bird [kg]
v = velocity of the bird [m/s]
Ek = kinetic energy [J]
We need to clear the mass from the equation given.
[tex]m=\frac{2*E_{k} }{v^{2}} \\m=\frac{2*8}{(4)^{2} } \\m=1 [kg][/tex]
