Question

1. state the definition of friction.
2. consider the two events and answer the questions.

friction a force between an object and the surface it is moving over
imagine you push a book across an extremely slippery surface. it slides right across because there is no friction. next, you push the same book across a rougher surface that exerts friction.

1. will the velocity of the book change as it moves across the surface with no friction? explain your answer.

Explanation:

According to Newton's first - law of motion, an object in motion will stay in motion with a constant velocity unless acted upon by an external force. Since there is no friction on the surface (and assuming no other external forces), there is no force to change the velocity of the book.

Answer:

No, the velocity of the book will not change as there is no external force (such as friction) acting on it to cause a change in its state of motion.