Answer:
F = 7.7 [N]
a = 2.2 [m/s²]
Step-by-step explanation:
In the attached picture we see the forces on the wooden block, the total force is obtained by means of the sum of the pushforce and the friction force.
![F_(total)=12.5-4.8\\F_(total)=7.7[N]](https://img.qammunity.org/2022/formulas/physics/high-school/ru3rc0kr7eucm1xz4a1lrhzf44lr62up6s.png)
Now we must apply Newton's second law, which tells us that the total force on the body must be equal to the product of mass by acceleration.

![7.7=3.5*a\\a=2.2[m/s^(2) ]](https://img.qammunity.org/2022/formulas/physics/high-school/dy7u1xy9q9ma5pef9aeu8xgcdyanad8629.png)