Question

A 0.14-kg baseball is moving at 41 m/s. A 0.058-kg tennis ball is moving at 67 m/s. Which of the two balls has higher kinetic energy?

Answer 1

tenis ball

Step-by-step explanation:

did the question for school

Answer 2

The kinetic energy of tennis ball is higher than that of baseball.

Step-by-step explanation:

mass of baseball
`m_(b)` = 0.14 kg

velocity of baseball
`v_(b)` = 41 m/s

mass of tennis ball
`m_(t)` = 0.058 kg

velocity of tennis ball
`v_(t)`= 67 m/s

To find: the kinetic energy of baseball
`KE_(b)` and tennis ball
`KE_(t)`

We know that the kinetic energy is given by the equation,

KE =
`(mv^(2))/(2)`

the kinetic energy of baseball
`KE_(b)` =
`(m_(b)v_(b) ^(2))/(2)`

=
`(0.14 * 41^(2))/(2)`

= 117.67 J

the kinetic energy of tennis ball
`KE_(t)` =
`(m_(t)v_(t) ^(2))/(2)`

=
`(0.058 * 67^(2))/(2)`

= 130.181 J

Hence
`KE_(t)` >
`KE_(b)`, the kinetic energy of tennis ball is higher than that of baseball