Question

The software for an elevator uses a variable, called level, to track the floor number of the elevator's current position. When a person presses a button indicating that the elevator should rise to a higher floor, the following goUp procedure is invoked with the desired number of floors to climb provided as a parameter. Procedure goUP floors Repeat Floors times IF [level < 9] level <– level +1 ELSE display [cannot go up] DISPLAY 'level '+ Level

Answer 1

When an elevator accelerates upward, the scale reading is higher than the actual weight. At a constant upward speed, the scale reading equals the person's weight. In a free-falling elevator, the scale would read zero, showing 'weightlessness'.

Step-by-step explanation:

The question pertains to the physics concept of forces and motion, specifically exploring what happens to the scale reading when a person is in an elevator that is accelerating or moving at a constant velocity. When the elevator accelerates upward, the scale shows a higher reading than the person's weight, because the upward force is greater than the gravitational force to achieve acceleration. However, when the elevator moves upward with a constant speed, the scale reading will match the person's actual weight because there is no acceleration - the forces are balanced and the net force is zero.

In the case of the elevator accelerating downward, the scale will show a lower reading since the acceleration is negative. If the elevator were to reach free-fall, accelerating downward at the rate of gravity (g), the scale would read zero, indicating the person is experiencing weightlessness.