Answer:
C. Quadruple
Explanation:
[tex]m[/tex] = mass
[tex]v_{i}[/tex] = initial speed = [tex]v[/tex]
[tex]K_{i}[/tex] = initial kinetic energy
Initial kinetic energy is given as
[tex]K_{i} = (0.5) m v_{i}^{2}\\K_{i} = (0.5) m v^{2}[/tex]
[tex]v_{f}[/tex] = Final speed = [tex]2 v[/tex]
Final kinetic energy is given as
[tex]K_{f} = (0.5) m v_{f}^{2}\\K_{f} = (0.5) m (2v)^{2}\\K_{f} = 4 (0.5) m v^{2}\\K_{f} = 4 K_{i}[/tex]
Hence the kinetic energy is quadruple
