Ball B (v) with a mass of 2.0 kg is rotating in an orbit of r = 0.8 m with a velocity = = 2.4 m / s. From this moment on, find the velocity of ball B at the moment when r is 0.5 m since the rope attached to it is pulled as shown in the figure with v, = 1.2m / s. Also calculate the work required to pull the rope.

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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.