Physics 5054 · O Level · Energy

Energy — practice question

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$8$

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