When a car is weighed, it is allowed to move over a scale which records a reading as the front wheels go over the scale, and a second reading when the rear wheels go over the scale. The weight of the car is equal to
A) the weight under the front wheels.
B) the weight under the rear wheels.
C) the sum of the two weights.
D) the average of the two weights.
Think about it. The weight of the car is the sum of the forces applied to the front and rear wheels. When the wheels are on the scale, only the front or the back are being measured.
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To determine the weight of the car, you need to understand the concept of weight distribution and how scales work.
When a car is weighed using a scale, it is important to consider the weight distribution between the front and rear wheels. The weight of an object is the force due to gravity acting on it, and it is typically measured in units of mass, such as kilograms or pounds.
In this scenario, there are two readings recorded: one when the front wheels go over the scale and another when the rear wheels go over the scale. Each reading corresponds to the force or weight applied to the specific set of wheels when they pass over the scale.
Now, let's analyze the answer options:
A) The weight under the front wheels: This answer implies that the weight of the car is equal to the reading recorded when only the front wheels are on the scale. However, this is incorrect because it does not account for the weight distribution over the rear wheels.
B) The weight under the rear wheels: Similarly, this answer suggests that the weight of the car is equal to the reading recorded when only the rear wheels are on the scale. But, as with option A, this does not consider the weight distribution over the front wheels.
C) The sum of the two weights: This answer takes into account both the weight under the front wheels and the weight under the rear wheels. Since the scale records separate readings for each set of wheels, you can add those readings together to determine the total weight of the car. Therefore, option C is the correct answer.
D) The average of the two weights: This answer involves finding the average of the weight under the front wheels and the weight under the rear wheels. However, taking the average of the two weights does not accurately represent the total weight of the car, as it doesn't consider the actual weight distribution between the wheels.
So, based on the explanation provided, the weight of the car is best represented by option C) the sum of the two weights.