A workman on the scaffolding outside one of the science classrooms drops a wrench. A physics student ...

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A workman on the scaffolding outside one of the science classrooms drops a wrench. A physics student, bored with the lesson, times it as it falls past the classroom window. She found that it took 0.6s to fall past the 2m tall window. Calculate the spanner’s initial velocity as it appears at the top of the window.