To answer this question, let's analyze the scenario step by step:
We are given that there are five gears connected in a row, and the first gear is connected to the second gear, the second gear is connected to the third gear, and so on.
Let's assume the size of the first gear is represented by "x". According to the question, the second gear is twice the size of the first gear, so its size is "2x". All the other gears are the same size as the first gear, which is "x".
Now, let's consider the relationship between the sizes of the gears and their speeds. In general, larger gears rotate more slowly than smaller gears. Therefore, if the second gear is twice the size of the first gear, it will rotate at a slower speed than the first gear.
Since all the other gears are the same size as the first gear, they will rotate at the same speed as the first gear. As a result, the last gear, which is the fifth gear in this case, will also rotate at the same speed as the first gear.
Therefore, the correct answer is B) Same. The last gear will rotate at the same speed as the first gear.