Which statement correctly explains mechanical advantage? a. it is the factor by which a machine shortens the length of time needed to do a certain job. b. it is the number of times a machine multiplies the effort force put into the machine. c. it is the distance over which a machine can move an object in one minute, at a set speed. d. it is the amount of force needed by a machine to double the efficiency of the machine.
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Which statement correctly explains mechanical advantage? a. it is the factor by which a machine sho...
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