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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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AlpenGlowidn

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.

Answer:

Acceleration is a vector quantity.

Explanation:

  • Acceleration is defined as the rate of change of velocity per unit time.
  • It is a vector quantity because it has both direction and magnitude.
  • The acceleration of an object can be both negative and positive. If an object gains speed then it is positive otherwise it is negative.
  • The units of accleartion are m/s^2.
  • therefore, the only correct statement is that it is a vector quantity.
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