Answer: The normal force N is given by N = μ * F, where μ is the coefficient of friction and F is the frictional force required to keep the block of metal moving with constant velocity across a surface. The frictional force F is equal to the normal force N multiplied by the coefficient of friction μ. The normal force is the force exerted by the surface on the block of metal perpendicular to the surface, and it is what opposes the weight of the block and prevents it from sinking into the surface.
Step-by-step explanation: