If a young son works quickly for 2 hours and prepares 16 items in a day, and his old father works slowly for 8 hours and prepares 24 items a day, which of the following is true.
The son has more power
This question asks us to compare the productivity or rate of work between a son and his father. In physics, the rate at which work is done is defined as power. Although the question uses terms like "quickly" and "slowly," we can quantify their work rates based on the number of items prepared and the time taken.
In the context of work rate, power can be thought of as the amount of 'work' (in this case, items prepared) done per unit of 'time'. The formula for power is generally:
\[ \text{Power} = \frac{\text{Work Done}}{\text{Time Taken}} \]
Here, 'Work Done' is represented by the number of items prepared.
Let's calculate the rate at which the son prepares items. We are given:
Using the power formula:
\[ \text{Son's Power} = \frac{\text{Son's items prepared}}{\text{Son's time worked}} \]
\[ \text{Son's Power} = \frac{16 \text{ items}}{2 \text{ hours}} = 8 \text{ items/hour} \]
So, the son works at a rate of 8 items per hour.
Next, let's calculate the rate at which the father prepares items. We are given:
Using the power formula:
\[ \text{Father's Power} = \frac{\text{Father's items prepared}}{\text{Father's time worked}} \]
\[ \text{Father's Power} = \frac{24 \text{ items}}{8 \text{ hours}} = 3 \text{ items/hour} \]
So, the father works at a rate of 3 items per hour.
Now we compare the calculated power levels (work rates) for the son and the father:
Comparing these two values: \(8 \text{ items/hour} > 3 \text{ items/hour}\). This shows that the son prepares items at a faster rate than his father.
Therefore, based on the definition of power as the rate of doing work, the son has more power in preparing these items.
Let's examine the given options based on our calculations:
Based on the comparison of their work rates, the statement that the son has more power is true.
| Concept | Definition in this context | Calculation |
|---|---|---|
| Work Done | Number of items prepared | Given in the problem |
| Time Taken | Hours spent working | Given in the problem |
| Power (Work Rate) | Items prepared per hour | \( \frac{\text{Items}}{\text{Hours}} \) |
It's important to understand the difference between energy and power. Energy is the total amount of work that can be done or the capacity to do work. Power is the rate at which that work is done. Think of it like speed and distance:
Someone who is more powerful can do the same amount of work in less time compared to someone less powerful. In this problem, the son is more powerful because he prepares items at a faster rate (more items per hour), even though the father prepares more items in total over a longer period (24 items vs 16 items).
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