A girl who weighs 30 kg is inline skating at a speed of 5 m/s. What is the girl's kinetic energy?

1 Answer
May 23, 2016

Kinetic energy of girl is 375 J

Explanation:

We can find kinetic energy of anybody/particle by plugging its mass and velocity in Kinetic energy equation

K=1/2mv^2

Where,

K is kinetic energy of object
m is mass of object
v is velocity of object

For this case mass of girl is 30 kg
Her velocity is 5m/s

According to equation

K=1/2mv^2

K=1/2*30*(5)^2

K=1/2*30*25

K=375 J

Kinetic energy of girl is 375 J