Two balls with identical masses of (2 kg) and radii of (0.5 meters) start at rest at the top of a plane that is (15 meters) long and inclined to the horizontal by an angle of (25 degrees). Ball 1 will slide down the plane without friction. Ball 2 will roll down the plane without slipping. (a) Which ball gets to the bottom of the plane first? (b) By how long does the winning ball beat the losing ball? (c) What is the linear speed of each ball when it arrives at the bottom of the plane?

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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.