physics

the nail puller shown in the figure below you exert a force 53.2 cm from the pivot and the nail is 1.50 cm on the other side. What minimum force must you exert to apply a force of 1380 N to the nail to pull the nail up?

38.9 N is correct

What is the mechanical advantage of the nail puller?

35.5 is correct

i need the steps to get to those answers

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  1. 1380 * 1.5 = F * 53.2
    so
    F = 1380 * 1.5 / 53.2 = 38.9 N

    advantage = force out/force in
    = 1380/38.9 = 35.5

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