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**Work done by a constant force!!!**

**A small plane tows a glider at constant speed and altitude. If the plane does 2.00 X 10^5 J of work to tow the glider 145m and the tension in the tow rope is 2560N, what is the angle between the tow rope and the horizontal?**

This is one of my homework problems. I think that I might be using the wrong formula for this. What formula should I use? And If its possible could someone please show me how to solve this step by step I really want to understand this stuff, so any and all help would be greatly appreciated!!!