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  9. A hoop and disc have...
A hoop and disc have same mass and radius. Their rotational K.E are related by an equation______________?

K.E hoop = K.E disc

K.E hoop = 2K.E disc

K.E hoop = 1/2K.E disc

K.E hoop = 4K.E disc

Answer: B . K.E hoop = 2K.E disc
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