contestada

Lifting a heavy piano in the air 30
feet to a second story room would
be the easiest by doing which of
the following actions?
A. jumping up 30 feet with the piano on your
back
B. carrying the piano up a ladder that is very
steep
C. carrying the piano up a long staircase with
many steps spread apart

Respuesta :

indrawboy

IMA = inclined mechanical advantage = distance (L) : height (h)

the longer the track / distance the easier we lift it

C. carrying the piano up a long staircase with many steps spread apart

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