Question

The force acting normally on a surface is called ____________.

Answer 1

1. The force acting normally (perpendicular) on a surface is called thrust.
2. Thrust is a vector quantity since the direction needs to be specified (perpendicular).
3. Unit of thrust is the same as that of force, i.e., $\mathrm{Newton}\left(N\right)$.

Hence, the force acting normally on a surface is called thrust.