Question

A horse and a lamb are running with same speed. Which of the two has more kinetic energy? Explain

Answer 1

a horse as it is heavier than lamb
let their masses be m1 and m2
their velocity is v
their kinetic energies will be
1/2m1v² & 1/2m2v²
since m1>m2 bcoz horse is heavier than lamb
therefore
1/2m1v²>1/2m2v²

Answer 2

If a lamb and horse are running with the same speed, kinetic energy of horse is more than the kinetic energy of the dog because the mass of a horse is more than the dog.
 
Explanation:  
Kinetic energy (K.E) = mv2/2, here velocity of both horse and dog are equal so
K.E a m 
So, more the mas more the kinetic energy is.