Answer:
  20 N
Explanation:
The relevant formula is ...
   F = ma . . . . m = mass, a = acceleration
   F = (10 kg)(2 m/s²) = 20 kg·m/s² = 20 N
George is applying force of 20 N.
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<em>Additional comment</em>
In 2 m/s², m is used to stand for the unit 'meters'. It should not be confused with the formula m, which stands for mass.