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# A lift is coming from the 8th floor and is just about to reach the 4th floor. Taking ground floor as origin and positive direction upwards for all quantities, which one of the following is correct?(A) \$x<0, v<0, a>0\$(B) \$x>0, v<0, a<0\$(C) \$x>0, v<0, a>0\$(D) \$x>0, v>0, a<0\$

Last updated date: 24th Jul 2024
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Hint: We should know that velocity is defined as the rate change of displacement per unit time. Speed in a specific direction is also known as velocity. Velocity is equal to displacement divided by time. Speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance which is a scalar quantity per time ratio. On the other hand, velocity is a vector quantity; it is direction-aware. An object which moves in the negative direction has a negative velocity. If the object is slowing down then its acceleration vector is directed in the opposite direction as its motion in this case. Based on this we have to solve this question.