3. The disk starts from rest and is given an angular acceleration a = (5t¹/2) rad/s², where t is in seconds. Determine the magnitudes of the normal and tangential components of acceleration of a point P on the rim of the disk when t = 2 s. Q1: Q3:

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A: At θ=20°Force F1=100 ×10-3×9.81=0.981 Nin  Vectorial formF1→=0.981× cos 20° i^ +sin 20° j^F1→=0.939…

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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.