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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...
10 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
10 years ago
by
राकेश कुमार मिश्रा