Science

posted by Timothy

A hammer with a 500-g head exerts an average force of 810n on a nail speed as it drives the nail 4 mm into wall. What was the speed of the hammer head when it hit the nail?

  1. Damon

    work done = change in Ke

    (1/2) (.5)(v^2) = 810 * 4 * 10^-3

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