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!