2.14x 1022 kg
the 22 is a xponet of ten
Good morning.
We calculate the acceleration with the <em>Torricelli equation</em>:

We see that:

Now:

Now we can calculate the
resultant force that makes that acceleration of
0.3 m/s² with the 2nd Law of Newton:

We have a force of
26 N → and a friction force
F ←. Adding those vectors, he have a force
6 N →. Therefore:
26 - F = 6
F = 20 NWe have a friction force of 20 N. We calculate the kinect coefficient with the formula:

Since we are in a horizontal plane, we hava that
N = P = mg = 200 NTherefore: