A trimmer for cutting weeds and grass near trees and borders has a nylon cord of 0.213-m length that whirls about an axl

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answerhappygod
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A trimmer for cutting weeds and grass near trees and borders has a nylon cord of 0.213-m length that whirls about an axl

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A trimmer for cutting weeds and grass near trees and borders hasa nylon cord of 0.213-m length that whirls about an axle at 661rad/s. What is the linear speed of the tip of the nylon cord?
A skater is initially spinning at a rate of 12.5 rad/s with arotational inertia of 2.33 kg·m2 when her arms areextended. What is her angular velocity after she pulls her arms inand reduces her rotational inertia to 1.64 kg·m2?
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