Answer:
40 J
Explanation:
first let find velocity
from law of conservation of energy
[tex] \sqrt{2gh} = v[/tex]
[tex] \sqrt{2(10)(8)} = v[/tex]
[tex] \\ 12.6 = v[/tex]
[tex]k.e = \frac{1}{2} mv {}^{2} [/tex]
approximately 40J (value of g is 9.8 but here it is 10)
