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jessica6597
20.08.2019 •
Biology
Which of the following describes acceleration? a. acceleration cannot be described with a negative number. b. acceleration is a vector quantity. c. acceleration describes how displacement changes with time. d. the si units for acceleration are m/s.
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Ответ:
The answer would be:
B. Acceleration is a vector quantity.
We can rule out the others because:
---Acceleration CAN be described with a negative number. The sign actually shows the direction. A negative number indicates a deceleration.
---Displacement change over time is the definition of velocity NOT acceleration.
---The SI unit for acceleration is m/s².
***A vector quantity is measure of magnitude and direction, which acceleration has.
Ответ:
Explanation:
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