Heya!!
For calculate aceleration, lets applicate second law of Newton:
![\boxed{F=ma}](https://img.qammunity.org/2021/formulas/physics/high-school/2nzxu7keqb4x6ttxo4cfto5110jjyze0ca.png)
Δ Being Δ
F = Force = 85,5 N
m = Mass = 24,3 kg
a = Aceleration = ?
⇒ Let's replace according the formula and clear "a":
![\boxed{a=85.5 \ N / 24.3\ kg}](https://img.qammunity.org/2021/formulas/physics/high-school/7pmrf5n3nxibv6ibuigx0j68yjf23odkv4.png)
⇒ Resolving
![\boxed{ a = 3.51 \ m/s^(2)}](https://img.qammunity.org/2021/formulas/physics/high-school/os65kx1zdk97zp7tu0mpladbghtkbmq12g.png)
Result:
The aceleration is 3,41 meters per second squared (m/s²)
Good Luck!!