Final answer:
The force of kinetic friction between the wooden block and the floor is equal to the pulling force, which is 30.0 N, since the block moves at constant velocity.
This correct answer none of the above.
Step-by-step explanation:
The question is related to the concept of kinetic friction in physics. Kinetic friction is the force that opposes the motion of two surfaces sliding against each other.
When a wooden block is pulled across a wooden floor at a constant velocity, the kinetic friction force is equal in magnitude to the pulling force acting on the block because there is no acceleration (Newton's first law of motion).
Hence, if a 30.0 N force is applied to the block to move it at a constant velocity, the magnitude of the force of kinetic friction between the block and the floor is also 30.0 N.
This correct answer none of the above.