Friday

April 18, 2014

April 18, 2014

Number of results: 55,025

**physics**

It takes the elevator in a skyscraper 3.6 s to reach its cruising speed of 10 m/s. A 69 kg passenger gets aboard on the ground floor. 1.What is the passenger's weight before the elevator starts moving? 2.What is the passenger's weight while the elevator is speeding up? 3.What ...
*Tuesday, September 28, 2010 at 3:34pm by madiha*

**physics**

It takes the elevator in a skyscraper 4.0 to reach its cruising speed of 10 . A 60 passenger gets aboard on the ground floor.What is the passenger's apparent weight while the elevator is speeding up?
*Friday, October 22, 2010 at 3:01pm by Luke*

**Physics**

A 500 kg elevator starts from rest. It moves upward for 4.00 s with constant acceleration until it reaches its cruising speed, 1.75 m/s. (a) What is the average power of the elevator motor during this period? (b) How does this power compare with the motor power when the ...
*Saturday, March 16, 2013 at 4:41pm by Michelle*

**Physics**

A 645-kg elevator starts from rest. It moves upward for t = 3.13 s with a constant acceleration until it reaches its constant cruising speed of v = 1.26 m/s. It moved 2.75m during that time. a) What is the average power (W)is delivered by the motor during the initial ...
*Wednesday, December 14, 2011 at 4:09pm by Sarah*

**physics**

A 690 kg elevator starts from rest. It moves upward for 2.56 s with constant acceleration until it reaches its cruising speed, 1.84 m/s. What is the average power of the elevator motor during this period?, What is the power of the elevator motor during an upward cruise with ...
*Sunday, February 19, 2012 at 8:33pm by Joe*

**physics**

A 690 kg elevator starts from rest. It moves upward for 2.56 s with constant acceleration until it reaches its cruising speed, 1.84 m/s. What is the average power of the elevator motor during this period? What is the power of the elevator motor during an upward cruise with ...
*Monday, February 20, 2012 at 11:09am by Harry*

**physics**

A 690 kg elevator starts from rest. It moves upward for 2.56 s with constant acceleration until it reaches its cruising speed, 1.84 m/s. What is the average power of the elevator motor during this period? What is the power of the elevator motor during an upward cruise with ...
*Monday, February 20, 2012 at 3:12pm by Tom*

**physics please help**

A 690 kg elevator starts from rest. It moves upward for 2.56 s with constant acceleration until it reaches its cruising speed, 1.84 m/s. What is the average power of the elevator motor during this period? What is the power of the elevator motor during an upward cruise with ...
*Monday, February 20, 2012 at 8:34pm by Riley*

**physics**

An elevator without a ceiling is ascending with a constant speed of 9.7 m/s. A boy on the elevator shoots a ball directly upward, from a height of 2.0 m above the elevator floor, just as the elevator floor is 25 m above the ground. The initial speed of the ball with respect to...
*Tuesday, September 21, 2010 at 11:48pm by kay*

**Physics**

If the maximum speed of the elevator is 1.30 m/s and it takes a total of 3.00 s for the elevator to move between the floors, what is the distance between the floors if the time that the elevator is at its top speed is 2.52 s ?
*Sunday, September 16, 2007 at 3:25am by Stumped Student*

**Physics**

An elevator in a tall building is allowed to reach a maximum speed of 3.3 m/s going down. What must the tension be in the cable to stop this elevator over a distance of 3.4 m if the elevator has a mass of 1330 kg including occupants?
*Thursday, October 14, 2010 at 11:46pm by John*

**Physics**

A 607-kg elevator starts from rest and moves upward for 4.40 s with constant acceleration until it reaches its cruising speed, 1.73 m/s. (a) What is the average power of the elevator motor during this period? . (b) How does this amount of power compare with its power during an...
*Wednesday, October 3, 2012 at 6:38pm by KK*

**physics**

A 650-kg elevator starts from rest and moves upward for 2.80 s with constant acceleration until it reaches its cruising speed, 1.64 m/s. (a) What is the average power of the elevator motor during this period? W (b) How does this amount of power compare with its power during an...
*Friday, October 12, 2012 at 12:09am by monic*

**physics**

A 650kg elevator starts from rest. It moves upward for 3s with constant acceleration until it reases its cruising speed, 1.75m/s. (a) what is the average power of the elevator motor during this period? (b) How does this compare with its power during an upward cruise with ...
*Sunday, October 28, 2007 at 1:38pm by Anonymous*

**physics**

An elevator in a tall building is allowed to reach a maximum speed of 3.61 m/s going down. What must the tension be in the cable to stop this elevator over a duration of 3 seconds if the elevator has a mass of 1370 kg including occupants?
*Friday, October 11, 2013 at 10:43am by Anonymous*

**physics**

The cable of an elevator of mass = 5320 kg snaps when the elevator is a rest at one of the floors of a skyscraper. At this point the elevator is a distance = 31.6 m above a cushioning spring whose spring constant is = 11700 N/m. A safety device clamps the elevator against the ...
*Friday, March 7, 2008 at 4:18pm by shelby*

**Physics Help..**

The cable of an elevator of mass M = 1900 kg snaps when the elevator is at rest at one of the floors of a skyscraper. At this point the elevator is a distance d = 10.6 m above a cushioning spring whose spring constant is k = 8500 N/m. A safety device clamps the elevator ...
*Monday, December 30, 2013 at 11:23am by Rick*

**Physics**

A(n) 563 kg elevator starts from rest. It moves upward for 3.18 s with a constant acceleration until it reaches its cruising speed of 1.96 m/s. The acceleration of gravity is 9.8 m/s 2 . Find the average power delivered by the elevator motor during this period. Answer in units...
*Thursday, December 20, 2012 at 9:45am by Nick*

**physics**

A 685 kg elevator starts from rest and moves upward for 2.80 s with constant acceleration until it reaches its cruising speed, 1.71 m/s. (a) What is the average power of the elevator motor during this period? (b) What is the average power during an upward cruise with constant ...
*Sunday, December 12, 2010 at 8:30pm by Eric*

**math**

an air plane takes off with an elevation of 27degrees. what is the total land distance the plane reaches a cruising altitude of 875 feet ? if the plane is traveling at a steady speed of 651 feet per hour, how much time will it take the plane to reach its cruising distance? ...
*Thursday, February 13, 2014 at 5:56pm by molly*

**Physics**

A weight is hung from the ceiling of an elevator by a massless string. under which circumstances will the tension in the cord be the greatest? smallest? a.) The elevator rises with decreasing speed b.) The elevator rises with increasing speed c.) The elevator is at rest d.) ...
*Tuesday, December 11, 2012 at 2:42pm by Maggie*

**physics**

An elevator in a tall building is allowed to reach a maximum speed of 3.0 m/s going down. What must the tension be in the cable to stop this elevator over a distance of 2.4 m if the elevator has a mass of 1500 kg including occupants? Need step by step help please!
*Monday, May 3, 2010 at 5:15pm by Anonymous*

**Physics**

The cable of an elevator of mass M = 1020 kg snaps when the elevator is at rest at one of the floors of a skyscraper. At this point the elevator is a distance d = 18.4 m above a cushioning spring whose spring constant is k = 6500 N/m. A safety device clamps the elevator ...
*Saturday, October 27, 2007 at 7:51pm by Elle*

**Physics**

The cable of an elevator of mass M = 1020 kg snaps when the elevator is at rest at one of the floors of a skyscraper. At this point the elevator is a distance d = 18.4 m above a cushioning spring whose spring constant is k = 6500 N/m. A safety device clamps the elevator ...
*Saturday, October 27, 2007 at 10:27pm by Elle*

**physics**

An elevator without a ceiling is ascending with a constant speed of 10m/s. A boy on the elevator shoots a ball directly upward, from a height of 2.0m above the elevator floor, just as the elevator floor is 28m above the ground. The initial speed of the ball with respect to the...
*Sunday, August 24, 2008 at 6:51pm by alk*

**physics**

In a large hotel, a fast elevator takes you from the ground floor to the 21st floor. The elevator takes 17 s for this trip: 5 s at constant acceleration, 7 s at constant velocity, and 5 s at constant deceleration. Each floor in the hotel has a height of 2.5 m. Calculate the ...
*Monday, September 26, 2011 at 6:03pm by K*

**physics**

A 83-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.2 m/s in 0.76 s. The elevator travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.8 s, and then comes to rest...
*Tuesday, October 23, 2012 at 6:16pm by ari*

**college physics**

A 78-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.2 m/s in 0.74 s. The elevator travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.8 s, and then comes to rest...
*Tuesday, September 21, 2010 at 8:12pm by justin*

**Physics**

A ball is thrown upwards at 15m/s from a window 20 metres above the ground. Find: a)How long the ball the takes to reach the level of the window b)How much longer it takes to reach the ground? c)What speed it takes to reach the ground?
*Wednesday, February 13, 2013 at 12:19pm by Aquile*

**Math**

A model of s skyscraper is 1.6 in. long,2.8 in. wide, and 11.2in. high.The scale factor is 8 in. 250 ft. What is the actual dimension of the skyscraper.
*Wednesday, February 15, 2012 at 7:33pm by Anonymous*

**Physics**

I know how to get the speed if it accelerated the whole time. How do I calculate the cruising speed? Starting from rest, a car travels 1,350 meters in 1 min. It accelerated at 1 m/s^2 until it reached its cruising speed. Then it drove the remaining distance at constant ...
*Friday, September 7, 2007 at 12:29am by Colin*

**physics**

A weight is hung by a cord from the ceiling of an elevator. From the following conditions, choose the one in which the tension of the cord would be the greatest...least?(draw force diagrams) a) elevator descending at a decreasing spped b)elevator at rest c)elevator rising at ...
*Wednesday, December 17, 2008 at 5:17pm by Jamie Lynn*

**Physics - Matter**

Wind blows around a skyscraper with a speed of 18 m/s outside a large pane of plate glass. What is the difference in air pressure between the inside and outside of the skyscraper? Take the density of air to be 1.3 kg/m3 and assume the air inside the skyscraper is still.
*Wednesday, April 11, 2012 at 9:32pm by Madeleine*

**Physics**

1. While riding on an elevator descending with a constant speed of 1.5 m/s, you accidentally drop a book form under your arm. (a) How long does it take for the book to reach the elevator floor, 1.2 m below your arm? (b) What is your book's speed relative to you when it hits ...
*Sunday, February 19, 2012 at 9:53pm by Priscilla*

**Physics**

An elevator is initially moving upward at a speed of 11.04 m/s. The elevator experiences a constant downward acceleration of magnitude 3.84 m/s2 for 3.06 s. (a) Find the magnitude and direction of the elevator's final velocity. (b)How far did it move during the 3.06 s interval?
*Wednesday, February 24, 2010 at 1:47pm by Delilah*

**Physics**

I just need help with part c. I know stopping takes longer but we have to explain why. A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 849 N. (a) As the elevator moves up, the scale reading increases to 912 N. Find ...
*Tuesday, January 5, 2010 at 4:08pm by Sasha*

**physics**

In Example 5.8, we investigated the apparent weight of a fish in an elevator. Now consider a 72.0 kg man standing on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.20 m/s in 0.80 s. It travels with this constant speed ...
*Thursday, March 21, 2013 at 6:14pm by Pritesh*

**physics**

A person in a stationary, non-moving elevator drops a coin and it reaches the floor 0.6 seconds later. Now he repeats the experiment with the elevator moving. Would the coin reach the floor in less time same time or more time, if it were dropped when the elevator was: ...
*Sunday, September 19, 2010 at 7:53pm by Rose Victory*

**Physical science**

An elevator motor did 300,000 Joules of work lifting a freight elevator(mass=500.0kg). If this story is 5.0 m and the elevator started on the ground floor, what is the highest level it could reach?
*Saturday, October 13, 2007 at 12:41pm by Sarah*

**Physics**

A 44.0 kg man stands on a bathroom scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.90 m/s in 1.19 s. It travels with this constant speed in the upward direction for the next 7.60 s. The elevator then slows down (undergoes a ...
*Friday, September 9, 2011 at 7:01pm by Elisabeth*

**physics**

An object is hung from a spring balance attached to the ceiling of an elevator cab. The balance reads 60 N when the elevator is standing still. (a) What is the reading when the elevator is moving upward with a constant speed of 9.6 m/s? N (b) What is the reading when the ...
*Thursday, December 11, 2008 at 4:54pm by johnny*

**Math**

Since the horizontal speed is constant, the time it takes to reach the fence is 8/v The height is h = 4.9 - 4.9t^2 We want h(t) = 2.4 when t=8/v, so 4.9 - 4.9(8/v)^2 = 2.4 v = 11.2 m/s
*Thursday, February 13, 2014 at 12:00pm by Steve*

**physics**

an elevator motor provides 45 W of power while lifting a 2000 kg elevator 35 m. if the elevator contains six passengers of the same mass and it takes 20.0 to accomplish this task, determine pass of each passenger.
*Saturday, January 12, 2013 at 3:35pm by tanya*

**physics**

Zach, whose mass is 69 kg, is in an elevator descending at 10 m/s. The elevator takes 2.5 s to brake to a stop at the first floor. (a) What is Zach's apparent weight before the elevator starts braking? 1 N
*Friday, October 8, 2010 at 12:36pm by Anonymous*

**college physics**

A 55 kg engineer leaves her office on the 33rd floor of a skyscraper and takes an elevator to the 59th floor. Later she descends to street level. If the engineer takes her office as the zero for potential energy and if the distance from one floor to the next is 3.5 m, what is ...
*Friday, May 14, 2010 at 2:59pm by Adam*

**physics**

The motor for an elevator can produce 2200 W of power. The elevator has a mass of 1100 kg complete with contents . At what constant speed will the elevator rise ?
*Tuesday, May 8, 2012 at 8:37pm by Melissa*

**physics**

The single cable supporting an unoccupied elevator breaks when the elevator is at rest at the top of a 155 m high building. With what speed does the elevator hit the ground?
*Saturday, December 4, 2010 at 9:40pm by Brittany*

**Math**

A jet climbs at an angle of 26 degrees to the ground. The cruising height for the jet is 8000m, the climbing speed is 300km/hr and the cruising speed is 450km/hr. How far is it from the airport 5 minutes after taking off? Please explain thoroughly.
*Saturday, February 15, 2014 at 1:02am by Brenard*

**Help:)**

Can someone help me with this? Someone was helping, but I'm still confused! Amos gets in an elevator at the 30th floor and begins to move downward at a speed of 8 feet per second. After 12 seconds, the elevator is 240 feet above the ground. A.) Let y= the height in feet of the...
*Tuesday, November 19, 2013 at 12:26pm by Pebbles*

**PHYSICS**

Zach, whose mass is 67 kg, is in an elevator descending at 12 m/s. The elevator takes 3.5 s to brake to a stop at the first floor. (a) What is Zach's apparent weight before the elevator starts braking? (b) What is Zach's apparent weight while the elevator is braking?
*Sunday, June 19, 2011 at 9:24pm by kate*

**physics**

The cavle on an elevator is what pulls the elevator up, and allows it to come down safely. The mass of the elevator is 1400 kg. If the elevator starts from rest and is pulled upwards with a constant tension of 18 kN, what will its speed be after moving 6m? (Assume no ...
*Sunday, October 7, 2007 at 8:57pm by Anonymous*

**physics**

3 part question: A 52-kg girl weighs herself by standing on a scale in an elevator. What does the scale read when: a.)the elevator is accelerating downward at 2.5 m/s2? b.)the elevator is accelerating upward at 2.5 m/s2? c.)the elevator is ascending at 10 m/s but its speed is ...
*Sunday, February 20, 2011 at 10:53pm by Brandon*

**Physics**

An elevator motor provides 45.0 kW of power while lifting a 2000 kg elevator 35 m. If the elevator contains six passengers of the same mass and it takes 20.0 s to accomplish this task, determine the mass of each passenger. Assume the system is 83 % efficient.
*Thursday, January 16, 2014 at 7:11pm by Holly*

**Physics**

A 46.0 kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.85 m/s in 1.07 s. It travels with this constant speed for the next 6.80 s. The elevator then slows down (undergoes a uniform acceleration in the ...
*Friday, September 9, 2011 at 7:26pm by Elisabeth*

**physics **

The cable of a 1800-kg elevator has broken, and the elevator is moving downward at a steady speed of 1.6 m/s. A safety braking system that works on friction prevents the downward speed from increasing. a. at what rate does mechanical energy turn into thermal energy. I found ...
*Tuesday, May 1, 2012 at 8:24pm by lost*

**physics **

The cable of a 1800-kg elevator has broken, and the elevator is moving downward at a steady speed of 1.6 m/s. A safety braking system that works on friction prevents the downward speed from increasing. a. at what rate does mechanical energy turn into thermal energy. I found ...
*Tuesday, May 1, 2012 at 8:42pm by lost*

**Math**

An elevator moves at a rate of -5.8 feet per second from a height of 300 feet above the ground. It takes 3 seconds for the elevator to make its first stop. How many feet above the ground is the elevator now?
*Saturday, September 21, 2013 at 1:26am by Alicia*

**physicsss**

A Thompson’s gazelle can reach a speed of 13 m/s in 3.0 s. A lion can reach a speed of 9.5 m/s in 1.0 s. A trout can reach a speed of 2.8 m/s in 0.12 s. Which animal has the greatest acceleration?
*Thursday, October 28, 2010 at 3:56pm by Jay*

**physics**

Two stones, A and B, are thrown horizontally from the top of a cliff. Stone A has an initial speed of 15 meters per second and stone B has an initial speed of 30 meters per second. Compared to the time it takes stone A to reach the ground, the time it takes stone B to reach ...
*Monday, November 18, 2013 at 2:12pm by Anonymous*

**physics**

Locomotive exert on a 13160-kg boxcar to make it accelerate forward at 0.40 m/s2. How long will it take the boxcar to reach its cruising speed of 105 km/h (65.2 mph or 29.2 m/s)?
*Wednesday, February 9, 2011 at 2:19pm by olivia*

**Physics**

Locomotive exert on a 12560-kg boxcar to make it accelerate forward at 0.38 m/s2. How long will it take the boxcar to reach its cruising speed of 112 km/h (69.6 mph or 31.1 m/s)?
*Wednesday, February 15, 2012 at 6:56pm by John *

**Physics**

A woman weighing 500 N stands in an elevator that is traveling upward. At a given instant the speed of the elevator as well as the women is 10m/s and both are decreasing at a rate of 2 m/s2 at that instant the elevator is exerts a force on the woman that is
*Tuesday, September 4, 2012 at 8:33pm by Mohamed *

**physics**

An elevator (cabin mass 540 kg) is designed for a maximum load of 3500 kg, and to reach a velocity of 4 m/s in 3 s. For this scenario, what is the tension the elevator rope has to withstand?
*Saturday, January 28, 2012 at 9:09pm by rachel *

**Physics**

An elevator (cabin mass 600 kg) is designed for a maximum load of 2800 kg, and to reach a velocity of 3.6 m/s in 5 s. For this scenario, what is the tension the elevator rope has to withstand?
*Wednesday, February 13, 2013 at 8:21pm by L'dya*

**Physics**

An elevator (cabin mass 600 kg) is designed for a maximum load of 2800 kg, and to reach a velocity of 3.6 m/s in 5 s. For this scenario, what is the tension the elevator rope has to withstand?
*Wednesday, February 13, 2013 at 8:21pm by L'dya*

**Physics**

A 1000kg elevator carries a maximum load of 800kg. A constant frictional force of 5000N retards the elevator's motion upward. What minimum power, in kilowatts, must the motor deliver to lift the fully loaded elevator at a constant speed of 3m/s?
*Saturday, December 10, 2011 at 2:18pm by Anonymous*

**PHYSICS~Acceleration**

Yes to your answer: "There would be upward acceleration at first and then there would be downward acceleration at the end". During the middle of the trip, velocity would be constant. It takes about one floor to reach a constant velocity, or decelerate; this varies with the ...
*Monday, November 22, 2010 at 7:06pm by drwls*

**Physics**

A man measures the acceleration of an elevator using a spring balance. He fastens the scale to the roof, and suspends a mass from it. If the scale reads 98N when the elevator is at rest, and 93N when the elevator is moving. a) what is the acceleration of the elevator? b) in ...
*Friday, October 22, 2010 at 8:39pm by Michael*

**Physics**

A man measures the acceleration of an elevator using a spring balance. He fastens the scale to the roof, and suspends a mass from it. If the scale reads 98N when the elevator is at rest, and 93N when the elevator is moving, (a) what is the acceleration of the elevator? (b) in ...
*Monday, October 25, 2010 at 7:22pm by Bianca*

**physics**

An elevator is initially moving upward at a speed of 12.84 m/s. The elevator experiences a constant downward acceleration of magnitude 3.80 m/s2 for 3.18 s. (a) Find the magnitude and direction of the elevator's final velocity. magnitude: direction:
*Tuesday, September 13, 2011 at 11:18pm by Nour *

**PHYSICS**

A 578 Newton person takes an elevator from the first floor to the second floor of a building. The elevator quickly accelerates at a rate of 1.1 m/s^2 and then moves at a constant speed. Find the passenger's apparent weight during this period of acceleration. (578N)(9.8)=5664....
*Sunday, February 5, 2012 at 6:40pm by GRISSELL*

**Help! Calculus**

An elevator in a high rise building accelerates and decelerates at the rate of 1 foot per second squared. Its maximum speed is 8 feet per second. It starts from rest, accelerates to its maximum speed and stays at that maximum speed until it approaches its destination where it ...
*Wednesday, November 6, 2013 at 9:46pm by Kimmie*

**calculus HELP!**

An elevator in a high rise building accelerates and decelerates at the rate of 1 foot per second squared. Its maximum speed is 8 feet per second. It starts from rest, accelerates to its maximum speed and stays at that maximum speed until it approaches its destination where it ...
*Wednesday, November 6, 2013 at 9:53pm by Kimmie*

**science**

An elevator in a high rise building accelerates and decelerates at the rate of 1 foot per second squared. Its maximum speed is 8 feet per second. It starts from rest, accelerates to its maximum speed and stays at that maximum speed until it approaches its destination where it ...
*Wednesday, November 6, 2013 at 10:19pm by Jenna*

**Physics**

A 645-kg elevator starts from rest and reaches a cruising speed of 1.47 m/s after 3.13 seconds. It moved 2.75 m during that time. What average power (W) is delivered by the motor during the initial acceleration of the elevator during the first 3.13 seconds? The correct ...
*Monday, June 6, 2011 at 8:08pm by Casey*

**Physics**

WOMAN IN ELEVATOR A woman weighs Fg= 650 N when standing on a stationary scale. Now, the woman is riding an elevator from the 1st floor to the 10th floor. As the elevator approaches the 10th floor, it decreases its upward speed from 8 m/s to 1 m/s in a time interval of 1 s. ...
*Saturday, November 2, 2013 at 12:42pm by Mary*

**physics **

Starting from rest, a boat increases its speed to 4.92 m/s with constant acceleration. (a) What is the boat's average speed? (b) If it takes the boat 5.07 s to reach this speed, how far has it traveled?
*Wednesday, August 29, 2012 at 9:16pm by stoic-rider77*

**physics**

The cable of a 1800-kg elevator has broken, and the elevator is moving downward at a steady speed of 1.6 m/s. A safety braking system that works on friction prevents the downward speed from increasing. a. speed of boat when leaves ramp (assume that engine turned off once boat ...
*Tuesday, May 1, 2012 at 8:20pm by lost*

**Physics**

The cruising speed in this case is the speed attained after the 1 min of acceleration. Call it V. The average speed during accleration is V/2. (V/2)*(60 s) = 1350 m V = 45 m/s
*Friday, September 7, 2007 at 12:29am by drwls*

**physics**

A 86-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.2 m/s in 0.86 s what does the spring scale measure in the first .86 seconds of the elevator's ascent?
*Wednesday, September 28, 2011 at 7:50pm by Anonymous*

**Physics**

An elevator cable breaks when a 950 kg elevator is 23 m above a huge spring (k = 2.3×105 N/m) at the bottom of the shaft. (a)Calculate the work done by gravity on the elevator before it hits the spring. (b) Calculate the speed of the elevator just before striking the spring. (...
*Wednesday, November 17, 2010 at 3:12am by Sasha*

**Physics**

A 58.0 kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.55 m/s in 1.25 s. It travels with this constant speed for the next 8.00 s. The elevator then slows down (undergoes a uniform acceleration in the ...
*Thursday, September 8, 2011 at 7:35pm by Ronda*

**trigonometry**

An airbus A320 aircraft is cruising at an altitude of 10000 m. The aircraft is flying in a straight line away from Rachel, who is standing on the ground. If she sees the angle of elevation of the aircraft change from 70 degrees to 33 degrees in one minute, what is its cruising...
*Wednesday, January 20, 2010 at 4:27pm by ann*

**physics**

The answer depends upon how long it takes to reach the 5.8 m/s speed. Force = (Mass) x (Acceleration) The Acceleration is the velocity change, divided by how long it takes to get there.
*Thursday, May 16, 2013 at 9:47am by drwls*

**Math**

An elevator named L in "63 Building" in Seoul is notorious for its low speed. It takes 3 seconds for L just to move one floor. It takes another 20 seconds for it to have its door open and close automatically. What is even more frustrating, is that the elevator travels only to ...
*Tuesday, May 7, 2013 at 1:46am by Bob *

**Physics**

A 1.0 x 10^3 kg elevator carries a maximum load of 800.0 kg. A constant frictional force of 4.0 x 10^3 N retards the elevator's motion upward. What minimum power, in kilowatts, must the motor deliver to lift the fully loaded elevator at a constant speed of 3.0 m/s? Please show...
*Sunday, July 7, 2013 at 10:18am by K*

**physics**

A 2.6x10^3 kg elevator carries a maximum load of 888.1 kg. A constant frictional force of 4.9x10^3 N retards the elevator's motion upward. The acceleration of gravity is 9.81 m.s^2. What minimum power must the motor deliver to lift the fully loaded elevator at a constant speed...
*Sunday, December 11, 2011 at 8:08pm by Homer*

**Math (Algebra)**

An elevator named L in "63 Building" in Seoul is notorious for its low speed. It takes 3 seconds for L just to move one floor. It takes another 20 seconds for it to have its door open and close automatically. What is even more frustrating, is that the elevator travels only to ...
*Saturday, May 11, 2013 at 4:16am by Shin*

**Osciallations**

The time to reach maximum speed after release is the time it takes to reach the lowest elevation, which is 1/4 of the period. The period is P = 2 pi sqrt(L/g) = 0.977 s 1/4 of that is 0.244 s Note that it is independent of how far up the pendulum is pulled
*Thursday, April 15, 2010 at 2:52am by drwls*

**Algebra**

Neil gets in an elevator at the 30th floor and it begins to move downward at a speed of 8 feet per second. After 12 seconds the elevator is 240 feet above ground. a. Let y= the height in feet of the elevator 'x' secinds after Neil got in. Write an equation to show the ...
*Tuesday, March 4, 2014 at 6:47pm by Natalie*

**physics**

- A 1600-KG ELEVATOR accelerates downward at 2.00 m/s2 starting from rest. how much work does gravity do on the elevator? b) how much does tention in the elevator cable do on the elevator? c) use the work kinetic energy theorem to find the kenetic energy of the elevator as it ...
*Monday, November 29, 2010 at 5:59pm by Anonymous*

**physics**

You step into an elevator holding a glass of water filled to a depth of 7.0 cm. After a moment, the elevator moves upward with constant acceleration, increasing its speed from 0 to 2.8 m/s in 3.8 s.
*Wednesday, November 23, 2011 at 3:50pm by x*

**physics**

18)An airplane has to fly eastward to a destination 856 km away. If wind is blowing at 18.0 m/s northward and the air speed of the plane is 161 m/s, in what direction should the plane head to reach its destination? 6.42 degrees south of east 19)A 4400 kg can accelerate from 0-...
*Monday, March 31, 2008 at 7:10pm by Jon*

**physics**

A 2.7 × 10 3 kg elevator carries a maximum load of 888.9 kg. A constant frictional force of 2.1 × 10 3 N retards the elevator’s motion upward. The acceleration of gravity is 9.81 m/s 2 . What minimum power must the motor deliver to lift the fully loaded elevator at a constant...
*Sunday, December 11, 2011 at 12:06pm by heeeeeeeeeelpppp!!!*

**Physics**

A man in an elevator is 79kg. The elevator itself is 860kg. As the elevator begins to move down, a scale the man is standing on reads 437N. How do I determine the acceleration of the elevator? (I tried dividing the force of the man by his mass, it was incorrect)
*Thursday, September 27, 2012 at 9:59am by Tim*

**Physics**

In a "worst-case" design scenario, a 2000-{\rm kg} elevator with broken cables is falling at 4.00 {\rm m/s} when it first contacts a cushioning spring at the bottom of the shaft. The spring is supposed to stop the elevator, compressing 2.00 {\rm m} as it does so. During the ...
*Sunday, March 13, 2011 at 9:27pm by Trevor*

**Physics**

An elevator manufacturing company is stress-testing a new elevator in an airless test shaft. The elevator is traveling at an unknown velocity when the cable snaps. The elevator falls 2.50 meters before hitting the bottom of the shaft. The elevator was in free fall for 0.900 ...
*Monday, November 29, 2010 at 8:35pm by Thomas*

**programming**

draw a flowchart and write a program and pseudocode that prompts the user for a starting balance and then prints the number of years it takes to reach 100000 and also number of years it takes to reach 1000000
*Wednesday, May 8, 2013 at 9:52am by maria*

**PHYSICSSS**

While an elevator of mass 2681 kg moves upward, the tension in the cable is 29.4 kN. (a) What is the acceleration of the elevator? (b) If at some point in the motion the velocity of the elevator is 1.04 m/s upward, what is the elevator's velocity 3.96 s later?
*Saturday, February 11, 2012 at 11:35pm by Anonymous*

**Physics**

An elevator (cabin mass 600 kg) is designed for a maximum load of 2100 kg, and to reach a velocity of 3.1 m/s in 3 s. For this scenario, what is the tension the elevator rope has to withstand? This is what I've tried and is incorrect. 2100kg + 600 kg= 2700kg (m) (3.1/3)= 1....
*Tuesday, September 25, 2012 at 1:48pm by Lauren*

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