A meteorological probe weighing 1.7 kg was launched from the ground, which needs to rise to an altitude of 30-40 km

A meteorological probe weighing 1.7 kg was launched from the ground, which needs to rise to an altitude of 30-40 km. During takeoff, the probe is subjected to a lifting force equal to 21.3 N. The acceleration due to gravity is 9.8 ms2. What is the gravity of the probe? What is the acceleration of the probe during takeoff?

Decision :
From gravity:
Ftyach = 1.7kgkg * 9.8N / kg = 16.6N
a = (Fa-mg) / m = 21.3H – 19.6H / 1.7kg = 1m / s ^ 2
The answer to this question is: 1 m / s ^ 2