Body $X$ has mass $m$ and speed $v$. A second body, $Y$, has mass $2m$ and speed $2v$. Determine the ratio $\frac{\text{kinetic energy of }Y}{\text{kinetic energy of }X}$.
- A$1$
- B$2$
- C$4$
- D$8$
Physics 5054 · O Level · Energy
Body $X$ has mass $m$ and speed $v$. A second body, $Y$, has mass $2m$ and speed $2v$. Determine the ratio $\frac{\text{kinetic energy of }Y}{\text{kinetic energy of }X}$.