A father plays with his little son on a frozen lake. They stood facing each other, put their hands together and pushed each other so that they move away from each other. If the father moved away with an acceleration of 0.8 m/s^2 and if he weighed four times as much as his son, determine the acceleration by which the son is sliding away. Assume that the force they exerted to each other is applied horizontally and that the contact between their shoes and the ice is frictionless

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.