ou are designing a high-speed elevator for a new skyscraper. The elevator will have a mass...
ou are designing a high-speed elevator for a new skyscraper. The elevator will have a mass limit of 2400 kg (including passengers). For passenger comfort, you choose the maximum ascent speed to be 18.0 m/s, the maximum descent speed to be 10.0 m/s, and the maximum acceleration magnitude to be 3.20 m/s2. Ignore friction.
You are designing a high-speed elevator for a new skyscraper. The elevator will have a mass limit of 2400 kg (including passengers). For passenger comfort, you choose the maximum ascent speed to be 18.0 m/s, the maximum descent speed to be 10.0 m/s, and the maximum acceleration magnitude to be 3.20 m/s2. Ignore friction.
What is the minimum time it will take the elevator to ascend from the lobby to the observation deck, a vertical displacement of 640 m?
Homework Answers
Here we apply concept of kinematics and equation of motion for constant acceleration.
Add Answer to:
ou are designing a
high-speed elevator for a new skyscraper. The elevator will have a
mass...
An elevator has mass 600 kg, not including passengers. The elevator is designed to ascend, at...
An elevator has mass 600 kg, not including passengers. The elevator is designed to ascend, at constant speed, a vertical distance of 20.0 m (five floors) in 16.0 s, and it is driven by a motor that can provide up to 40 hp to the elevator. A. What is the maximum number of passengers that can ride in the elevator? Assume that an average passenger has mass 65.0 kg.
An elevator has mass 650 kg , not including passengers. The elevator is designed to ascend,...
An elevator has mass 650 kg , not including passengers. The elevator is designed to ascend, at constant speed, a vertical distance of 21.0 m(five floors) in 16.7 s , and it is driven by a motor that can provide up to 44 hp to the elevator. What is the maximum number of passengers that can ride in the elevator? Assume that an average passenger has mass 65.0 kg.
An elevator has mass 700 kg, not including passengers. The elevator is designed to ascend, at...
An elevator has mass 700 kg, not including passengers. The elevator is designed to ascend, at constant speed, a vertical distance of 32.0 m in 25.0 s, and it is driven by a motor that can provide up to 40 hp to the elevator. ( 1hp=746W ) What is the maximum number of passengers that can ride in the elevator? Assume that an average passenger has mass 65.0 kg. You need to round DOWN when you calculate the number of passengers....
An elevator has mass 650 kg , not including passengers. The elevator is designed to ascend,...
An elevator has mass 650 kg , not including passengers. The elevator is designed to ascend, at constant speed, a vertical distance of 19.0 m (five floors) in 15.5 s , and it is driven by a motor that can provide up to 44 hp to the elevator. Part A What is the maximum number of passengers that can ride in the elevator? Assume that an average passenger has mass 65.0 kg. Express your answer in integer n = _______
It takes the elevator in a skyscraper 4.1 S to reach its cruising speed of 12...
It takes the elevator in a skyscraper 4.1 S to reach its cruising speed of 12 m/s . A 70kg passenger gets aboard on the ground floor. Part A What is the passengers weight before the elevator starts moving? Express your answer to two significant figures and include the appropriate units. ? Part B What is the passenger?s weight while the elevator is speeding up? Express your answer to two significant figures and include the appropriate units. ? Part C...
A hotel elevator ascends 130 m with a maximum speed of 5.0 m/s . Its acceleration...
A hotel elevator ascends 130 m with a maximum speed of 5.0 m/s . Its acceleration and deceleration both have a magnitude of 1.3 m/s2 . HOW LONG DOES IT TAKE TO MAKE THE COMPLETE TRIP FROM TOP TO BOTTOM?
A hotel elevator ascends 200m with maximum speed of 5m/s. Its acceleration and deceleration both have...
A hotel elevator ascends 200m with maximum speed of 5m/s. Its acceleration and deceleration both have a magnitude of 1.0m/s2. How long does it take to make the complete trip from bottom to top?
A hotel elevator ascends 200 m with a maximum speed of 5.0 m/s. Its acceleration and...
A hotel elevator ascends 200 m
with a maximum speed of 5.0 m/s. Its acceleration and deceleration
both have a magnitude of 1.0 m/s2. How far does the
elevator move while accelerating to full speed from rest? how long
does it take to make the complete trip from bottom to top?
2. MP HW P2.58 (Refer to example 2.10, p.47) A hotel elevator ascends 200m with maximum speed of 5m/s. Its acceleration and deceleration both have a magnitude of 1.0m/s...
Page 204 Practice Problem 7.11: If the mass of the elevator (with four what should the...
Page 204 Practice Problem 7.11: If the mass of the elevator (with four what should the spring constant Answer: 2.18x10 N/m. a the spring constant be for a maximum compression of 3.00m? ! is equal to that EXAMPLE 7.11 Elevator safety (or not) to this exoblem we have to account for both gravitational potential energy and elastic potential energy. In a worst-case" design scenario, a 2000 kg elevator with broken cables is falling at 8.00 m/s when it first con...
Two red blood cells each have a mass of 4.40 × 10-14kg and carry a negative...
Two red blood cells each have a mass of 4.40 × 10-14kg and carry a negative charge spread uniformly over their surfaces. The repulsion arising from the excess charge prevents the cells from clumping together. Once cell carries -2.20 pC of charge and the other -3.10 pC, and each cell can be modeled as a sphere 7.20 um in diameter. What minimum relative speed v would the red blood cells need when very far away from each other to get...
It takes the elevator in a skyscraper 4.1 S to reach its cruising speed of 12 m/s . A 70kg passenger gets aboard on the ground floor. Part A What is the passengers weight before the elevator starts moving? Express your answer to two significant figures and include the appropriate units. ? Part B What is the passenger?s weight while the elevator is speeding up? Express your answer to two significant figures and include the appropriate units. ? Part C...
A hotel elevator ascends 200 m
with a maximum speed of 5.0 m/s. Its acceleration and deceleration
both have a magnitude of 1.0 m/s2. How far does the
elevator move while accelerating to full speed from rest? how long
does it take to make the complete trip from bottom to top?
2. MP HW P2.58 (Refer to example 2.10, p.47) A hotel elevator ascends 200m with maximum speed of 5m/s. Its acceleration and deceleration both have a magnitude of 1.0m/s...
Page 204 Practice Problem 7.11: If the mass of the elevator (with four what should the spring constant Answer: 2.18x10 N/m. a the spring constant be for a maximum compression of 3.00m? ! is equal to that EXAMPLE 7.11 Elevator safety (or not) to this exoblem we have to account for both gravitational potential energy and elastic potential energy. In a worst-case" design scenario, a 2000 kg elevator with broken cables is falling at 8.00 m/s when it first con...
Two red blood cells each have a mass of 4.40 × 10-14kg and carry a negative charge spread uniformly over their surfaces. The repulsion arising from the excess charge prevents the cells from clumping together. Once cell carries -2.20 pC of charge and the other -3.10 pC, and each cell can be modeled as a sphere 7.20 um in diameter. What minimum relative speed v would the red blood cells need when very far away from each other to get...
Most questions answered within 3 hours.
-
Write a program that reads in a text file, infile.txt, and
prints out all the lines...
asked 1 hour ago -
Which of the following orbits have a total of zero energy (based
on the common convention)?...
asked 2 hours ago -
Find the expected count and the contribution to the chi-square
statistic for the (Group 1, No)...
asked 3 hours ago -
Suppose you are purchasing a meal and with every meal a you
receive one of 10...
asked 3 hours ago -
A 75.0 kg 0erson is riding in a car moving at 20.0 m/s when the
car...
asked 3 hours ago -
What does Δp = QR mean in words?
Pushing a viscous fluid through a pipe requires...
asked 3 hours ago -
We know that system.out.println (“object number” + n ); is
legal.String name; int n; name =...
asked 3 hours ago -
Come up with a real-life problem (open-ended) and solve it by
designing and writing a Java...
asked 3 hours ago -
Power Music owns five music stores, where it sells music,
instruments, and supplies. In addition, it...
asked 3 hours ago -
True or false and
why:
Given the following sequence of numbers to be
inserted {4,5,6,1,2,3,8,7}, the...
asked 4 hours ago -
Code using Java
What is an interface? Complete the following code:
interface IExample{
public void print();...
asked 4 hours ago -
Bob Nale is the owner of Nale’s Quick Fill. Bob would like to
estimate the mean...
asked 4 hours ago