Question

If mass is doubled velocity is doubled then kinetic energy will be what

Answer 1

$Ratio = \frac{K.E_{i}}{K.E_{f}} \\ \\ = \frac{ \frac{1}{2}m {v}^{2} }{ \frac{1}{2} 2m4 {v}^{2} } \\ \\ = \frac{ \frac{m {v}^{2} }{2} }{4m {v}^{2} } \\ \\ = \frac{m {v}^{2} }{8m {v}^{2} } \\ \\ = \frac{1}{8} \\ \\ ratio = 1:8$