Respuesta :
Answer:
49 J
Explanation:
All we have to do here is use the equation KE= [tex]\frac{1}{2}[/tex]m[tex]v^{2}[/tex]. Since the mass is 2kg and the speed is 7 m/s, we can plug in the values.
KE= [tex]\frac{1}{2}[/tex](2)([tex]7^{2}[/tex])
KE= 49 J.