ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements.
Divide 0.0081 meters by 300 seconds and express the answer in scientific notation.
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Ответ:
The heavier wagon rolls 1/2 as fast as the lighter wagon.
Explanation:
When the compressed spring that joins them is released then the force acts on both wagons will be of equal magnitude but in the opposite direction. However as the mass of one wagon is twice that of other, so the acceleration will become half of the heavier wagon in comparison with lighter one.