Hello!
We have the following data:
KE (Kinetic Energy) = 480 J
m (mass) = ? (in Kg)
v (speed) = 8 m/s
Formula to calculate kinetic energy:
[tex]KE = \frac{1}{2} *m*v^2[/tex]
Solving:
[tex]KE = \frac{1}{2} *m*v^2[/tex]
[tex]480 = \frac{1}{2} *m*8^2[/tex]
[tex]480 = \frac{1}{2} *m*64[/tex]
[tex]480*2 = 64*m[/tex]
[tex]960 = 64m[/tex]
[tex]64m = 960[/tex]
[tex]m = \frac{960}{64} [/tex]
[tex]\boxed{\boxed{m = 15\:Kg}}\end{array}}\qquad\checkmark[/tex]
