Question

3. A bird flying 4 m/s has 8 joules of kinetic energy. What is the mass of the bird?

Answer 1

Answer:

The mass of the bird is 1 [kg]

Explanation:

The kinetic energy is defined by the following equation:

$E_{k} =\frac{1}{2} *m*v^{2}$

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.

$m=\frac{2*E_{k} }{v^{2}} \\m=\frac{2*8}{(4)^{2} } \\m=1 [kg]$