Two bodies of weight 20 N and 10 N are connected to the two ends of a light inextensible string, passing over a smooth pulley. The weight of 20 N is placed on a horizontal surface while the weight of 10 N is hanging free in air. The horizontal surface is a rough one, having coefficient of friction between the weight 20 N and the plane surface equal to 0.3, determine. 1. the acceleration of the system. 2. the tension in the string.   Tension of String (N)=______ Acceleration (m/s²)=_____

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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.