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When a car is weighed, it is driven slowly on a horizontal floor over a scale that records a reading as the front wheels go over the scale, and then records a second reading as the rear wheels go over the scale. The weight of the car is equal to

A) the weight under the rear wheels.

B) the average of the two weights.

C) the sum of the two weights.

D) the weight under the front wheels.

E) the difference of the two weights.

Respuesta :

Answer: C

Explanation:

batolisis

The best answer to the question is The weight of the car is equal to the sum of the two weights ( C )

The measurement by the scale is done in phases in order the get the accurate weight of the vehicle. The weight of the car in the first phase of the scale reading is represented as half the total weight of the car ( i.e. mg/2) since it is recorded only with the front wheels. while the weight of the car in the second scale reading is also taken into account as half the total weight of the car since it is recorded only with the rear wheels as well.( i.e. mg/2 ).

Therefore to get the weight of the car ( accurate weight ) we will have to sum up the values of the two weights : mg/2 + mg/2 = mg

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