Hey guys, I'm wondering if I can get some help with a question in my homework. Here's the question: A workman on the scaffolding outside one of the physics classrooms drops a wrench. A pupil decides to time how long it takes for it to pass the classroom window. It was found that it took 0.6seconds to fall past the 2 metre tall window. Calculate the wrenches initial velocity as it appears at the top of the window. I am presuming that this requires an equation of motion, but I am really not sure on where to start/what equation to use. Any help would be greatly appreciated.