will the velocity of the book change as it moves across the surface with friction? explain your answer.

The velocity of a book will change as it moves across a surface with friction. This is because friction is a force that opposes the motion of the book, acting in the opposite direction to its movement. The frictional force causes the book's velocity to decrease over time, eventually slowing it down and potentially bringing it to a stop if the frictional force continues to act. In contrast, if the surface has no friction, the book would maintain a constant velocity as no force opposes its motion according to Newton's first law of motion.