The vertical rod has a downward velocity v = 1.7 ft/sec and an upward acceleration a = 2.9 ft/sec² when the device is in the position shown. Determine the corresponding angular acceleration of bar AB (positive if counterclockwise, negative if clockwise) and the magnitude of the acceleration of roller B if R = 16 in.

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Q: The disk shown rolls without slipping. Its center O has a speed of 3 m/s and is decelerating at 5…

A: we know that v=rωω=vr =30.4 =7.5rad/s

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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.