Question

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?

Answer 1

The tennis ball has more kinetic energy

Step-by-step explanation:

Recall the formula for kinetic energy:
`K=(1)/(2) \,m\,v^2` , so we can estimate it for each case and compare the results:

For the baseball:

`K=(1)/(2) \,m\,v^2\\K=(1)/(2) \,0.14\,(41)^2\,\,J\\K=117.67\,\,J`

For the tennis ball:

`K=(1)/(2) \,m\,v^2\\K=(1)/(2) \,0.058\,(67)^2\,\,J\\K=130.181\,\,J`

Therefore, the tennis ball has more kinetic energy