What is the kinetic energy of a 5 kg ball that is traveling with a constant velocity a distance of 100 meters in 8 seconds ?

Question

Steps please, thank you ^_^

2801 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-10-21T19:20:47

Answer: $390.625$ J

Note that $KE=1/2mv^2$ , where $KE$ is kinetic energy, $m$ is mass, and $v$ is velocity

We are given:
$m=5$ kg
$Deltad=100$ m
$Deltat=8$ sec

Since the ball travels at constant velocity, we can use the formula $v=(Deltad)/(Deltat)$ :
$v=100/8=12.5$ m/s

Plugging $m$ and $v$ into the formula for kinetic energy, we get:
$KE=1/2mv^2=1/2(5)(12.5)^2=390.625$ Joules.