$A$ horse of mass $210\, kg$ and a dog of mass $25\, kg$ are running at the same speed. Which of the two possesses more kinetic energy? How?
(A) The expression for kinetic energy is $KE = \frac{1}{2} mv^{2}$.
Since the kinetic energy is directly proportional to the mass $(KE \propto m)$ when the speed $(v)$ is constant,the object with the greater mass will have more kinetic energy.
Given that the mass of the horse $(210\, kg)$ is greater than the mass of the dog $(25\, kg)$,the horse possesses more kinetic energy.
Since the kinetic energy is directly proportional to the mass $(KE \propto m)$ when the speed $(v)$ is constant,the object with the greater mass will have more kinetic energy.
Given that the mass of the horse $(210\, kg)$ is greater than the mass of the dog $(25\, kg)$,the horse possesses more kinetic energy.
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