4-13. The double wheel has two wheels welded together. The mass and radius of gyration of the double wheel are  and , respectively. A normally distributed force  is applied to the inner wheel to hoist the 100 kg block that is attached to the outer wheel. If  and , determine the probability that the velocity of the block is smaller than 10 m/s after 5 seconds. Assume the block is originally at rest and the mass of the rope is negligible.

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