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shawonna23
Sep22-04, 01:19 AM
A rock of mass 33 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 239 N. What is the magnitude of the acceleration of the rock?

? m/s2
Nylex
Sep22-04, 01:35 AM
This is really basic. Use F = ma:

F = ma

mg - 239 = ma

Now put in the values for m and g and solve for a.