Question

The dog has a mass of 20 kg. The girl has a mass of 60 kg. Suppose both the dog and the girl run away from home at a velocity of 2 m/s. What is the kinetic energy of the dog?

Answer 1

dog: ½ x 20kg x (2m/s)² = 10 x 4= 40J
girl: ½ x 60kg x (2m/s)² = 30 x 4 = 120J
She has greater MASS!