. A lift is coming from 8th floor and is just about
to reach 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
Displacement is downward, x<0
Velocity is also downward ,v<0
But acceleration is in direction of velocity ,a>0
Hence, the correct option is (A) i.e. : x < 0, v < 0, a > 0.