Physics, 28.09.2020 23:01 shellxavier1

Consider an elevator in a tall building. The elevator is initially at rest on a floor that is neither the highest nor lowest floor, At time t = 0, the doors of the elevator begin to close. The acceleration of the elevator from time
= 0 to time - 25 seconds is shown in the graph above. Let the positive direction be upward.
(a)
Is the elevator moving upward, moving downward, or at rest at time t = 12 seconds? If the elevator is
moving, state its speed. In any case, explain your reasoning.
(b)
Is the elevator moving upward, moving downward, or at rest at time t = 22 seconds? If the elevator is
moving, state its speed. In any case, explain your reasoning.

Answers: 1

Show answers

Another question on Physics

Physics, 21.06.2019 14:00

Which statements describe the relationship between science and society? check all that apply. science is influenced by the needs of society. science and society are independent. science seeks ways to meet the needs of society. scientists find new ways to address societal concerns. scientists improve existing products.

Answers: 3

Answer

Physics, 22.06.2019 10:00

This is important 1. what happens to the speed of molecules in water vapor when it condenses to form a liquid? (2 points) the molecules slow down. the molecules speed up. the molecules slow down and then speed up. the molecules speed up and then slow down. 2. how might human activities change to compensate for a decrease in water supplies? (2 points) humans might build a factory. humans might build drainage systems. humans might extract more water from the ground. human behavior does not change because of the water cycle. i'll be grateful if anyone can answer these 2 questions !

Answers: 1

Answer

Physics, 22.06.2019 12:30

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?

Answers: 3

Answer

Physics, 22.06.2019 13:40

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th

Answers: 1

Answer

You know the right answer?

Consider an elevator in a tall building. The elevator is initially at rest on a floor that is neithe...

Questions