GIVE REASON FOR A HORSE AND A DOG ARE RUNNING AT THE SAME SPEED. ONE OF THEM HAS MORE KINETIC ENERGY.

You have read that

KE = 1/2 m v²

Now, even if the speed is same, the value of KE will be different because of the difference in the mass of the dog and the horse.

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as we knowthat 1/2*M*v sq.so this depends on the square of velocity .thats why the other one has more kinetic energy.

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