Find the acceleration.?
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The net force is 69.9 N, right and the acceleration is 3.5 m/s/s, right.
Note that the vertical forces balance but the horizontal forces do not. The net force is
Fnet = 129.9 N, right - 60 N, left = 69.9 N, right
The mass is
m = (Fgrav / g) = 20 kg
So the acceleration is
a = (69.9 N) / (20 kg) =3.50 m/s/s.
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