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As here rod is in rotational motion about the hinged point we use kinetic energy (1/2 I omeaga^2) which is considered in this video... pl watch it again...
9 years ago
by
Physics Galaxy
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Hello Ashu in previous case the cylinder was having both linear and rotational motion and here it is purely rotational motion that is why you are finding this difference. Thanks
8 years ago
by
राकेश कुमार मिश्रा