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July 31, 2014

Search: It takes the elevator in a skyscraper 3.6 to reach its cruising speed of 11 . A 63 passenger gets aboard on the ground floor

Number of results: 8,175

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?
October 22, 2010 by Luke

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 ...
September 28, 2010 by madiha

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 ...
March 7, 2008 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 ...
December 30, 2013 by Rick

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 ...
October 27, 2007 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 ...
October 27, 2007 by Elle

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 ...
January 5, 2010 by Sasha

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?
October 13, 2007 by Sarah

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?
October 14, 2010 by John

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.
January 12, 2013 by tanya

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?
October 11, 2013 by Anonymous

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
October 8, 2010 by Anonymous

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...
September 21, 2010 by kay

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 ...
May 14, 2010 by Adam

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.
January 16, 2014 by Holly

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!
May 3, 2010 by Anonymous

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?
June 19, 2011 by kate

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 ...
September 26, 2011 by K

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.
April 11, 2012 by Madeleine

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?
January 28, 2012 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?
February 13, 2013 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?
February 13, 2013 by L'dya

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 ?
September 16, 2007 by Stumped Student

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.
February 15, 2012 by Anonymous

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?
September 21, 2013 by Alicia

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?
February 13, 2013 by Aquile

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 ...
October 22, 2010 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 ...
October 25, 2010 by Bianca

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: ...
September 19, 2010 by Rose Victory

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 ...
February 19, 2012 by Priscilla

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 ...
November 29, 2010 by Anonymous

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...
November 19, 2013 by Pebbles

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...
August 24, 2008 by alk

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....
September 25, 2012 by Lauren

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.) ...
December 11, 2012 by Maggie

equations
you decide to ride ann elevator until it takes you to the ground floor withour pushing any buttons the elevator takes you up 4 floors down 6 floors up 1 floor down eight floors down 3 floors up 1 and then down six floors to ground level on what floor did you begin
September 7, 2011 by bata

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 ...
November 29, 2010 by Thomas

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...
October 23, 2012 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...
September 21, 2010 by justin

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)
September 27, 2012 by Tim

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?
February 11, 2012 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 ...
February 20, 2011 by Brandon

physics
A person stands on a bathroom scale on a motionless elevator. When the elevator begins to move, the scale briefly reads 200 percent of the person's regular weight. Calculate the acceleration of the elevator, a_{elevator}. Use SI units
February 21, 2014 by Ryan

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 ...
December 17, 2008 by Jamie Lynn

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
May 8, 2013 by maria

Physics
Safety engineers estimate that an elevator can hold 20 persons of 65 kg average mass. The elevator itself has amass of 450 kg. Tensile strength tests show that the cable supporting the elevator can tolerate a maximum force of 2.94e4 N. What is the greatest acceleration that ...
September 19, 2007 by Anonymous

Physics
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? Please helppp ...
February 8, 2012 by Anonymous

physics
Apparent Weight. A physics student weighing 600 N stands on a bathroom scale in an elevator. As the elevator starts moving, the scale reads 420 N . A )Find the magnitude of the acceleration of the elevator. B ) Find the direction of the acceleration of the elevator.( up or ...
November 14, 2006 by Hadi

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 ?
May 8, 2012 by Melissa

Physics
A 1200 kg elevator is attatched to a cable whose tension is 11700 n. What is the magnitude of the elevator's acceleration? What is the Motion of the elevator? could have multiple answers.
January 19, 2011 by Bill

College Physics
A 6107 kg elevator is moving 4.6 m/s up. The tension in the elevator cable is 66,512.6 N. Determine the acceleration of the elevator (state the appropriate mks units).
September 9, 2012 by Joe

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?
December 4, 2010 by Brittany

physics
2. A ball is thrown vertically upward from the 15m level in an elevator shaft with an initial velocity of 20 m/s. At the same instant an open-platform elevator passes the 6m level, moving upward with a constant velocity of 2 m/s. Determine a. When and where the ball will hit ...
December 20, 2012 by anshuman kumar

physiscs
a pendulum of the length L is suspended from the ceiling of an elevator. When the elevator is at rest , the period of the pendulum is T. In instant when the pendulum reaches its highest position the elevator starts the free fall. What is the period of the pendulum if the ...
September 21, 2010 by Ray

phys sci..
A 12.5kg monkey hangs from a cord suspended from the ceiling of an elevator. The cord can withstand a tension of 157N and breaks as the elevator accelerates. What was the magnitude of the elevator's minimum acceleration? What was the direction of the elevator's minimum ...
October 2, 2009 by Dione

Physics
An elevator's cable is cut causing the elevator to slide down thhe elevator shaft on the emergency brakes and wheels. Suppose that the mass of the elevator and passengers were 1500 kg, and the frictional force (wheels on tracks)was 9000N Draw a force diagram determine the ...
December 9, 2012 by None

Help Physics
A child with a mass of 39 kg stands on a spring scale inside an elevator. For each of the scenarios below, draw a force diagram of the forces acting on the child and calculate the reading of the scale in newtons. (a) The elevator is at rest. _______ N (b) The elevator is ...
October 9, 2012 by arcos15

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 ...
March 21, 2013 by Pritesh

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 ...
September 9, 2011 by Elisabeth

physics
A 70kg man stands on a bathroom scale in an elevator. As the elevator starts moving, the scale reads 90kg Is the elevator acceleration up or down, is the elevator moving up or down?
October 27, 2010 by help

Physics
As part of a physics experiment, you stand on a bathroom scale in an elevator. Though your normal weight is 690 N, the scale at the moment reads 588 N. (a) Is the acceleration of the elevator upward, downward, or zero? (b) Calculate the magnitude of the elevator's acceleration...
November 2, 2012 by James

physics
A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 845 N. As the elevator moves up,the scale reading increases to 940N,then decreases back to 845N. The acceleration of gravity is 9.8 m/s^2. Find the acceleration of the ...
July 12, 2011 by alexa

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 ...
October 7, 2007 by Anonymous

physics
A person in an elevator is holding a 13 kg block by a cord rated to withstand a tension of 226 N. When the elevator starts up, the cord breaks. What was the minimum acceleration of the elevator?
December 16, 2010 by Georgia

physics
A person in an elevator is holding a 13 kg block by a cord rated to withstand a tension of 226 N. When the elevator starts up, the cord breaks. What was the minimum acceleration of the elevator?
December 16, 2010 by Georgia

physics
A 69-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 823 N. What is the acceleration of the elevator? m/s2 upward
September 29, 2012 by Anonymous

physics
An 800 N man stands on a scale in a motionless elevator. When the elevator begins to move, the scale reads 650 N. Find the magnitude and direction of the elevator's acceleration.
December 19, 2010 by Sam

Physics
A 650 N student stands on a scale in an elevator. As the elevator starts to move, the scale reads 780 N. a. Find tha acceleration. b. Is the elevator going up or down?
December 4, 2011 by Tomomi

Physics
A 67-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 840 N. What is the acceleration of the elevator?
October 11, 2012 by Anonymous

physics
A 62-kg man standing on a scale in an elevator notes that as the elevator rises, the scale reads 843 N. What is the acceleration of the elevator? .
February 25, 2013 by Anonymous

physics
find the tension in an elevator cable which must support a 4000 N elevator with a maximum upward acceleration of 2 g's. What would be the tension if the elevator were allowed to accelerate downward at .25g's?
April 23, 2012 by Syd

physics 101
A person in an elevator is holding a 15 kg block by a cord rated to withstand a tension of 180 N. When the elevator starts up, the cord breaks. What was the magnitude of the minimum acceleration of the elevator?
September 22, 2012 by laura

Math Check 2 ?s quick
The angle of elevation to the top of a 20-story skyscraper is measured to be 10 from a point on the ground 1,500 feet from the building. Find the height of the skyscraper in feet, correct to three decimal places. (Points : 5) 260.47 73.86 972.54 264.49 <-- Let f(x) = sin-...
January 14, 2014 by Jake

science
Suppose you hang an object of weight W by a string from a hanging spring scale, such as the kind used in some grocery stores. You then hang the scale with the object from the ceiling of an elevator. When the elevator is standing still, the scale will read the actual weight of ...
April 8, 2013 by Hanna

math
an elevator is moving up at a rate of one meter per second. the elevator is now at the street level. when was the elevator five meters below street level? when will the elevator be 10 meters above street level?
July 1, 2014 by jamjam

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?
February 24, 2010 by Delilah

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-...
March 31, 2008 by Jon

Physics
A loaded elevator with very worn cables has a total mass of 3000 kg, and the cables can withstand a maximum total tension of 40,000 N. (a) What is the maximum upward acceleration for the elevator if the cables are not to break? (b) What must the tension be in order for the ...
November 18, 2006 by Vv

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....
February 5, 2012 by GRISSELL

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 ...
December 11, 2008 by johnny

Geometry
Just really quick, my friend and I disagree on this problem. I got 1997 and he got 721.033 4. A surveryor is standing on horizontal ground level with the base of a skyscraper. The angle formed by the line segment from his position to the top of the skyscraper is 31 degrees. ...
January 17, 2013 by MathMat

math
one elevator leaves first floor of a building at 9:00 a.m. It takes 5 seconds to travel between floors, stays 10 seconds at each floor and stops at each floor on its way to the top. Another elevator leaves the 12th (top) floor at 9:00 a.m. ; it takes 5 seconds to travel ...
February 2, 2013 by Sena

Physics
A cable lifts a 1370 kg elevator at a constant velocity for a distance of 42 m. What is the work done by each of the following? (a) the tension in the cable (J) (b) the elevator's weight (J) work by tension in cable if the car is not accelerating=mgh workweight=-mgh This ...
February 26, 2007 by Mary

Physics
You stand on a bathroom scale that rests on the floor of an elevator. Standing on the scale compresses internal springs and activates a dial that indicates your weight in newtons. When the elevator is at rest, the scale reads 600 N. Then the elevator begins to move upward with...
May 1, 2012 by Bob

Physics (A man in the lift)
A man of mass m is standing in an elevator. The elevator is accelerating downward at g/k, where k>1 and g is the gravitation acceleration. If the force on the man by the elevator's floof jmg, where j is a constant and k= a/(b+cj), where gcd(|a|,|b|,|c|)=1, what is a+b+c? If...
July 3, 2014 by Ahsanur

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 ...
March 13, 2011 by Trevor

PHYSICS 2
A 15.7 kg monkey hangs from a cord suspended from the ceiling of an elevator. The cord can withstand a tension of 240 N and breaks as the elevator accelerates. What was the elevator's minimum acceleration? (Assume the positive direction is upward.) Draw out your forces. This ...
October 9, 2006 by Ellie Mae

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?
September 28, 2011 by Anonymous

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?
December 10, 2011 by Anonymous

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
September 4, 2012 by Mohamed

Physics - Vertical Motion
A 64kg person is standing on a scale in an elevator. the elevator is rising at a constant velocity but then begins to slow, with an acceleration of 0.59m/s^2. What is the sign of the acceleration? What is the reading on the scale while the elevator is accelerating.
August 11, 2010 by Shaila

Physics
An elevator starts from rest with a constant upwards acceleration of 1m in the first 1.4 seconds. A passenger in the elevator is holding a 6.3 kg bundle at the end of the vertical cord. what is the tension in the cord as the elevator accelerates. the acceleration of gravity is...
September 25, 2012 by Anthony

Physics
An elevator starts from rest with a constant upward acceleration and moves 1 m in the first 1.7 s. A passenger in the elevator is holding a 6.6 kg bundle at the end of a vertical cord. What is the tension in the cord as the elevator accelerates? The acceleration of ...
January 28, 2013 by Kaylin

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 elevatorís 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...
December 11, 2011 by heeeeeeeeeelpppp!!!

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. ...
November 2, 2013 by Mary

Physics
An elevator starts from rest with a constant upward acceleration and moves 1m in the first 1.9 s. A passenger in the elevator is holding a 5.3 kg bundle at the end of a vertical cord. The acceleration of gravity is 9.8 m/s2 . What is the tension in the cord as the elevator ...
September 19, 2010 by Cole

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 ...
May 7, 2013 by Bob

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 ...
May 11, 2013 by Shin

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...
July 7, 2013 by K

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 ...
May 1, 2012 by lost

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