Question

Why is Electrical power required at all when the elevator is descending? Why should there be a limit on the number of passengers in this case ?

Answer 1

Hi sister,

Here is your answer

When an elevator is descending, Electrical power is required to control it's motion and to prevent it from falling freely under gravity. The cable of the elevator is able to sustain some limiting value of tension developed in it. Due to this reason, it is needed to limit the number of passengers (weight) in the elevator.


Hope it helps you !

Answer 2

1. is for control (and probably stopping).

2.     There is not a limit on the number of passengers in a car, except that there must be a seat for each passenger and restraint devices for each when required. If you have a van with two seats designed for 5 people with five restraint devices, you may carry 5. The same van can have another seat, or two, mounted toward the rear and be allowed to carry 4 to 6 more with proper restraints.

It is true that additional people and cargo will affect the vehicles center of gravity, fuel economy, handling, and braking ability. More weight means more strain! A tire's (tire) friction against the road generates heat, and the more weight the more friction. Also, overloading and improper inflation for the load carried bend the tire out of it's designed conformation, increasing the problem. The additional heat causes any present problems or flaws in the tire to magnify leading to failure.