A student is a spring scale attached to a textbook to compare the static and kinetic friction between the textbook and the top of a lab table if the scale measures 1580 g by the student is pulling the sliding back along the table which reading on the scale could’ve been possible at the moment the student overcame the static friction
A- 1860g
B-1140g
C-820g
D-1580g
no
static friction coef is GREATER than sliding.
no 1860
To determine the reading on the spring scale at the moment the student overcame the static friction, we need to understand the concepts of static and kinetic friction and how they relate to the measurements.
Static friction is the force that opposes the motion of an object at rest. It is generally greater than kinetic friction, which is the force that opposes the motion of an object already in motion.
In this scenario, the student is trying to overcome the static friction between the textbook and the lab table by pulling it. The textbook is not moving initially, so static friction is in effect. As the student pulls with increasing force, the reading on the spring scale gradually increases until the static friction is overcome, after which kinetic friction takes effect and the textbook starts moving.
Now, let's analyze the given options:
A - 1860g
B - 1140g
C - 820g
D - 1580g
Since the initial measurement on the scale is 1580g, which is the weight of the textbook, we can conclude that the scale is calibrated to measure the force of gravity acting on the object. However, the reading on the spring scale will increase as the student applies a force greater than the static friction but just before the textbook overcomes it.
To find the reading on the scale at that moment, we should look for the force that is slightly higher or equal to the static friction but less than the applied force by the student.
Since static friction is typically greater than kinetic friction, we can eliminate option D (1580g) because it represents the weight of the textbook (static friction is not overcome yet).
Between options A, B, and C, the one that lies between the static friction force and the force applied by the student will be the most accurate answer.
Without knowing the specific values of the static and kinetic friction, it is difficult to determine the exact reading on the scale. However, based on the given options, the closest answer is:
C - 820g
Therefore, the reading on the scale at the moment the student overcame the static friction would most likely be 820g.