1. Find the individual masses:

* For m1: We know F = ma, where F is force, m is mass, and a is acceleration.

* 5 N = m1 * 10 m/s²

* m1 = 5 N / 10 m/s² = 0.5 kg

* For m2: We can use the same formula, but we need to convert the acceleration to m/s². Assuming "20m" is meant to be 20 m/s², we have:

* 5 N = m2 * 20 m/s²

* m2 = 5 N / 20 m/s² = 0.25 kg

2. Calculate the total mass:

* Total mass (m) = m1 + m2 = 0.5 kg + 0.25 kg = 0.75 kg

3. Calculate the acceleration of the combined masses:

* Using F = ma again:

* 5 N = 0.75 kg * a

* a = 5 N / 0.75 kg = 6.67 m/s² (approximately)

Therefore, the force of 5 N would give the combined masses an acceleration of approximately 6.67 m/s².