Question

As a girl pushes and object across a wood floor she suddenly comes to an area where the floor has been waxed recently making it slippery . What becomes true if the coefficient of kinetic friction

Answer 1

The coefficient of kinetic friction between the object and the floor can be determined by comparing the force of kinetic friction and the normal force. If the object starts moving when a force of 100 N is applied, it means the coefficient of kinetic friction is less than or equal to 100 N divided by the weight of the object.

Step-by-step explanation:

The coefficient of kinetic friction between the object and the floor is the ratio of the force of kinetic friction to the normal force. In this case, the normal force is equal to the weight of the object, which can be calculated using the mass and gravitational acceleration. If the student is pushing the object with a force of 100 N and it starts moving, it means the force of kinetic friction is less than or equal to 100 N. Therefore, it can be said that the coefficient of kinetic friction between the box and the floor is less than or equal to the ratio of the force of kinetic friction to the weight of the object.

Answer 2

This question is incomplete but the completed question is below

As a girl pushes an object across a wood floor, she suddenly comes to an area where the floor has been waxed recently, making it slippery. What becomes true of the coefficient of kinetic friction? A. The coefficient of kinetic friction increases. B. The coefficient of kinetic friction decreases. C. The coefficient of kinetic friction becomes zero. D. The coefficient of kinetic friction becomes negative.

The correct option is B

Step-by-step explanation:

Coefficient of kinetic friction can be defined as the frictional force resisted by the motion of an object. From the question, it might take the girl to apply a force equivalent to just half that of the weight of the object to overcome friction to keep the object moving on a wood floor. Once she gets to the waxed area, the frictional force reduces, thereby also reducing the coefficient of kinetic friction further. Thus, she will be able to use less than half of the force (equivalent to less than half of the weight of the object) to push the object.

Thus, the correct option is B.