Question

Find the acceleration.?​

Answer 1

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.