Answer:
c) triple(3x)
Step-by-step explanation:
The equation for kinetic energy is:
![k=(1)/(2)mv^2](https://img.qammunity.org/2020/formulas/biology/middle-school/12qv98ek2mxz0x5u2kfjuzbpj1is55kw72.png)
if the mass triples we will have that the new kinetic energy
is:
![k'=(1)/(2)(3m)v^2](https://img.qammunity.org/2020/formulas/biology/middle-school/imbtgklgnpip4j1e89u1w04a0etldqopb6.png)
which can also be written as:
![k'=3((1)/(2)mv^2)](https://img.qammunity.org/2020/formulas/biology/middle-school/i2sigqfxyzz4rlz1rpg4ctu3l68bbha2y6.png)
and
is the original kinetic energy
, so:
![k'=3(k)](https://img.qammunity.org/2020/formulas/biology/middle-school/7dtwc179whx79hwbh15vdo59tlwokzrf2w.png)
⇒the new kinetic energy is three times the original kinetic energy.
the answer is: his kinetic energy will triple (3x) which is option c.