carla demonstrates newton's first law of motion. My slowly pushing a book across a table the book moves a constant rate of speed so long as she's pushing it. Which of the following is not true. 1 her push balances the force of friction . 2 the upward force exerted by the table balances the booklet. 3 there is a unbalanced forced on the book acting in the direction of motion. 4 the forces acting on the book are all balanced.
The statement that is not true is: 4 the forces acting on the book are all balanced.
Newton's first law of motion states that an object at rest will remain at rest, and an object in motion will continue in motion at a constant speed in a straight line, unless acted upon by an unbalanced external force. In this scenario, Carla is applying a force to push the book, which creates an unbalanced force in the direction of motion. The force of friction opposes the motion of the book and is balanced by Carla's push. The upward force exerted by the table, known as the normal force, balances the weight of the book but does not directly affect the motion in this scenario. Therefore, statement 4 is not true.
you sure
Apologies for the confusion in my previous response. Let's reassess the options:
1. Her push balances the force of friction: This statement is true. Carla's push provides the necessary force to overcome the force of friction acting on the book, allowing it to move at a constant speed.
2. The upward force exerted by the table balances the booklet: This statement is false. The upward force exerted by the table is the normal force, which balances the weight of the book, not the force of friction or the force required to move the book.
3. There is an unbalanced force on the book acting in the direction of motion: This statement is true. Carla's push on the book creates an unbalanced force in the direction of motion, allowing the book to move.
4. The forces acting on the book are all balanced: This statement is false. As explained earlier, Carla's push creates an unbalanced force, while the force of friction acts in the opposite direction. The upward force exerted by the table balances the book's weight, but it does not directly affect the motion.
Therefore, the correct answer is option 4: "The forces acting on the book are all balanced."