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.

24. Based on Figure 2, what is the order of the 3 blocks, from the block that required the shortest time to reach 15 m/sec to the block that required the longest time to reach 15 m/sec ?

Answer and Explanation

Your Answer is

Correct Answer is F

Explanation

Look at figure 2, when the ordinate is 15, the abscissa time of the 2.00 kg line is smaller, indicating that this block first reaches the speed of 15 m/sec;

The abscissa is 15 , the abscissa of the line of 3.00 kg is the largest, so it reaches the speed of 15 m/sec at the latest;

So the chronological order should be 2.00 kg, 2.50 kg, 3.00kg