In the laboratory, a long platform of negligible mass is free to rotate on a fulcrum. A force probe is placed a fixed distance $$\(x\)$$ from the fulcrum, supporting the platform. An object of fixed mass is placed a variable distance $$\(d\)$$ from the fulcrum. For each position $$\(d\)$$, the force probe is read. It is desired to determine the mass of the object from a graph of data. Which of the following can determine the object's mass?
A.
Plot the reading in the force probe times \(x\) on the vertical axis; plot the gravitational field times \(d\) on the horizontal axis. The mass is the slope of the line.
B.
Plot the reading in the force probe on the ver- tical axis; plot the distance \(d\) on the horizontal axis. The mass is the area under the graph.
C.
Plot the reading in the force probe on the vertical axis; plot the distance \(d\) multiplied by the distance \(x\) on the horizontal axis. The mass is the \(y\)-intercept of the graph.
D.
Plot the reading in the force probe times \(d\) on the vertical axis; plot the distance \(x\) on the horizontal axis. The mass is the slope of the line divided by the gravitational field.
Exam No：AP Physics 1 Problem Set 1 Year：2024 Question No：APPhysics12024AP0187
Answer:
A
Knowledge points:
7.2 Torque and Angular Acceleration
Solution:
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