victorpila05
victorpila05 victorpila05
  • 03-04-2020
  • Physics
contestada

Does a 0.14 kg baseball moving at 41 m/s or a 0.058-kg tennis ball moving at 67 m/s
have more kinetic energy?

Respuesta :

mberisso
mberisso mberisso
  • 03-04-2020

Answer:

The tennis ball has more kinetic energy

Explanation:

Recall the formula for kinetic energy: [tex]K=\frac{1}{2} \,m\,v^2[/tex] , so we can estimate it for each case and compare the results:

For the baseball:

[tex]K=\frac{1}{2} \,m\,v^2\\K=\frac{1}{2} \,0.14\,(41)^2\,\,J\\K=117.67\,\,J[/tex]

For the tennis ball:

[tex]K=\frac{1}{2} \,m\,v^2\\K=\frac{1}{2} \,0.058\,(67)^2\,\,J\\K=130.181\,\,J[/tex]

Therefore, the tennis ball has more kinetic energy

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