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Yea i just realised that rotational momentum of the earth would make it fly on a tangent but gravity acts as the centripetal force. I was thinking that because the tower rotates with the earth there was nothing keeping the mass up, but i forgot about the momentum

The mass on the tower at the equator would fall straight down because it has the same angular momentum as the earth upon being dropped, so although it would fall in a parabolic arc the earth would spin at the same speed so it would still land near the bas of the tower.

There was way too much harder 3 unit I think and not enough mechanics questions. That volumes question = WTF

Isn't the format of the exam different this year anyway? Im pretty sure its 6 questions at 15 marks each and 10 multiple choice. So maybe with fewer questions, timing wont be an issue.