anthony3913
16.07.2019 •
Physics
Which statement is true? a. speed is a scalar quantity and velocity is a vector quantity. b. speed and velocity are both scalar quantities. c. speed and velocity are both vector quantities. d. speed is a vector quantity and velocity is a scalar quantity. e. speed and velocity are neither a scalar quantity nor a vector quantity.
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Ответ:
A. Speed is a scalar quantity and velocity is a vector quantity.
Explanation:
A scalar quantity is one that consists of only a numerical value.
Speed is a scalar quantity because only the instantaneous value is indicated, for example the speedometer of a car that tells you your speed at the moment but not where you are going or in what direction are you going.
On the other hand, velocity is a vector quantity. Because it is composed of a magnitude and a direction, for example 10m/s to the south is a velocity, and 10m/s is a speed.
Ответ:
Вес противовеса, или сила нагрузки, составляет затем 100 000 фунтов-футов, разделенных на 20 футов, или 5000 фунтов.
Explanation: