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A thin metal disc of radius 0.25m and mass 2kg starts from rest and rolls down an inclined plane. If the rotational kinetic energy is 4J at the foot of the inclined plane. Then it's linear velocity at the same point is

Chaitanya , 6 Years ago
Grade 12
anser 1 Answers
Arun

Last Activity: 6 Years ago

Dear student
 
Rotational k.e. = 1/2 * I * w²
1/2(1/2 mr²) v²/r² = 4
Put r = 2
Yhen you will get
v² = 8
Hence
v = 2 * sqrt(2)

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