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  1. E

    Four bells toll at intervals of 40 mins, 60 mins, 75 mins and 45 mins. If they start

    together:? After how many minutes will they next toll together? After how many hours will they next toll together? How many times will they toll together over a year? This question is in my maths book in the chapter review section, but I'm sure I haven't covered it yet and my test's tomorrow...
  2. E

    A hoist is used to lift a 750kg car 2.2m in the air, the hoist takes 15s to reach 2.2m.?

    A hoist is used to lift a 750kg car 2.2m in the air, the hoist takes 15s to reach 2.2m. Determine the amount of work (in joules) done by the hoist on the car. A revision question for my exam, I though of using W=Fx, and then needed to use F=ma, but all formulas that I know use v (end velocity)...
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