Question

lift descends for Florence and then stops it then distance two more floors and stops finally it descends 1 floor if the lift does this twice a day what is the total number of floss ate descends in a day​

Answer 1

In one turn, the lift descends= 4+2+1= 7 floors.

If it does this twice a day, it descends 7 *2 = 14 floors

Answer 2

Displacement < 0, Velocity < 0

Here the upward direction positive. As. the lift is coming in downward direction, the displacement will be negative. We have to see whether the motion is accelerating or retarding.

We know that due to downward motion displacement will be negative. When the lift reaches 2nd floor and is about to stop velocity is decreasing with time, hence motion is retarding in nature.

Thus, x < 0; a > 0.

As displacement is in negative direction, velocity will also be negative, i.e. v < 0.

The motion of lift will be shown like this.