Tina uses a force of 90 kg weight at a distance of 250cm from the fulcrum of a crowbar to
lift the log of wood placed 50cm away from the fulcrum. What is the weight of the log and what
is its mechanical advantage? [5M]
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What is its mechanical advantage? Solution: Effort arm = 7.5 cm. Load arm = 15 cm. Mechanical advantage M.A = Effort arm ... (a) If a weight W is placed at a distance of 250 cm from the support on the longer arm, Find W.
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