One of Darren's model cars keeps rolling off its track. The other cars stays on the track. What should he do?

a) change the shape of the track
b)study the wheels of the car that will not stay on the track
c)change the tires on all of the cars
d)build a model of the cars and the track to use in experiments

I would use d.

Thanks Dr.Bob222

To determine what Darren should do about his rolling model car, we can analyze the given options.

a) Changing the shape of the track: This could potentially help if the track's design is causing the issue. Darren could experiment with adjusting the track's shape to see if the car stays on better. To do this, Darren could try rearranging the track pieces, modifying the angles or curves, or using additional supports to prevent the car from rolling off. This approach aims to address any underlying design flaw in the track.

b) Studying the wheels of the car that will not stay on the track: This option suggests that there might be something wrong with the wheels of the specific car that keeps rolling off. Darren could examine the wheels closely to identify any issues or defects. He should ensure that all the wheels are properly attached and spinning freely without any obstructions. For example, if a wheel is loose or misaligned, Darren may need to adjust or fix it.

c) Changing the tires on all of the cars: This option assumes that the tires on all the cars could be the cause of the problem. If Darren notices that the tires are damaged, worn out, or uneven, he can replace them with new ones. By maintaining consistent tire quality across all the cars, he eliminates the possibility of the specific car with poor tires being the only one that rolls off. Changing the tires would involve finding suitable replacements and ensuring they are securely fitted to the model cars.

d) Building a model of the cars and the track to use in experiments: This option suggests creating a scaled-down model of the cars and the track to simulate different scenarios and test potential solutions. Darren could construct a smaller version of the track and replicate the cars using materials like cardboard or 3D printing. This way, he can experiment with different setups, track designs, wheel modifications, or other variables to determine the cause of the rolling issue and find a solution.

To make the best decision, Darren should analyze each option carefully and consider which one addresses the likely causes of the rolling issue. He can assess the track's design, study the wheels of the problematic car, evaluate the condition of the tires, and potentially build a model for experimentation. Therefore, the most suitable answer would be to d) build a model of the cars and the track to use in experiments.