Passage V
In 2 experiments, a student pulled each of 3 blocks in a straight line across a flat, horizontal surface.
In Experiment 1, the student measured the pulling force (the force required to move each block at a constant speed) and plotted the pulling force, in newtons (N), versus block mass, in kilograms (kg). The results are shown in Figure 1.
In Experiment 2, the student measured the speed versus time of a 2.00 kg block, a 2.50 kg block, and a 3.00 kg block as each block was pulled across the surface with a constant 30 N force. The results are shown in Figure 2.
26. Based on Figure 1, the results of Experiment 1 are best modeled by which of the following equations?
Your Answer is
Correct Answer is J
Explanation
According to figure 1, take a random point, for example, when the ordinate pulling force=5, the abscissa block mass=1. From this we can see that pulling force(N)=5.0×block mass(kg)