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Compute all given parts of following problem:

Problem: A man pushes a wooden crate on wooden floor. The direction of the force is 30odownward relative to the horizontal (the man is taller than the height of the crate).

Part I: How much force does he use in order to maintain a constant speed?

Part II: How much work is done if he pushes the crate over a distance of 25.0 m?

I need the right answer and steps of solving this problem. Thanks!

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