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A student stands on a bathroom scale in an elevator at rest on the 53th floor of a building. ?
11 year ago
Question : A student stands on a bathroom scale in an elevator at rest on the 53th floor of a building. ?
The scale reads 867 N.
As the elevator moves up, the scale reading increases to 991 N, then decreases back to 867 N. Find the acceleration of the elevator.
As the elevator approaches the 63th floor, the scale reading drops to 683 N. What is the acceleration of the elevator?
floor scale
Best answer:
Answer by Blair A
using Newtons 2nd law of motion we find that F(unbalanced) = ma
Weight = mg
mass = weight/gravitational field strength
mass = 867/9.81(assuming hes on earth)
mass = 88.4kg.
F(unbalanced) = 991 – 867 = 124 N
124 = 88.4 x a
a = 1.4 m/s/s
same again for part b)
mass = 88.4kg
Fub = 683 – 867 = -184 (- implies direction)
a = -2m/s/s or deceleration by 2 m/s/s whatever u want
Cheers
Blair
what is the best way to calbrate a floor scale in a cGMP environment?
01 year ago
Question : what is the best way to calbrate a floor scale in a cGMP environment?
The scales are in a cGMP facility and we’re not sure that the current calibration procedure is good enough. Currently a 3rd party is calibrating annually and they are just using four different weights on a range from 0 – 2000 kg. If they fall within tolerance, the calibration is done. If not, a corner load test is done and adjustments made. Is this enough? A lot more is done with the analytical balances.
floor scale
Best answer:
Answer by anza_1
Regulation 211.68 requires that “If such equipment is so used, it shall be routinely calibrated, inspected, or checked according to a written program designed to assure proper performance. Written records of those calibration checks and inspections shall be maintained.”
So in your particular case, there is nothing unique about calibrating your floor scale to be used in the cGMP environment except that you need to have a documented schedule, procedure, and records. What an auditor may ask is, why do you perform this more rigorous calibration for your analytical balances than your floor scale?
Only you can answer this question, but things to consider are:
what is the range of masses that the floor scale is used to measure? Do you cover this range in your calibration procedure?
Do you include calibration points outside the allowed range to ensure you are accurate at your limits?
While the scale is rated to 2000kg, do you allow it to be used at that limit (since operating near the equipments limit may result in a reduction in accuracy)?
Does your weighing process require the load to be centered on the balance? If not, do you calibrate the scale accuracy for offset loads?
Feng Shui – Why you need to Draw a Floor Plan To Scale here
01 year ago
floor scale
www.fengshui.com.au Feng Shui Tip number 1. Feng Shui Floor Plans and having a blueprint that’s in scale helps us to get better results and create good fengshui. Especially when it comes to Feng Shui in the Bedroom this counts because moving your bed 2 inches to the left could help you move your bed completely out of negative Feng Shui energy!
Bypass Coupler Of Floor Scale
01 year ago
floor scale
Coupler is a great feature of DIGIWEIGH floor scales, which enables the scale cable detachable. However, end users can bypass the coupler and mount the cable directly onto the summing board. This video clip is showing how to do it.
NTEP floor scale designed for precision
01 year ago
floor scale is used to have heavy objects, which is difficult to evaluate using other types of traditional weigh scale. The main objective of the scale indicates accurate readings. Commercial, operational and technical perspectives of the accuracy in the measurement of weight is of utmost importance. Therefore, the accuracy and reliability of the floor scale to size and weight ensure department manages a program of NTEP.
means NTEP National Type Evaluation Program and evaluates the process by the manufacturer of the floor scale used and whether the data as required by NIST Handbook 44, are met or not. If the scale as recommended by the match by the NTEP, local government officials to final authorization from the legal trade problem. Once the local authorities to use satisfactory level for commercial purposes and with lawyers in the brand are upThere are some technical parameters that are checked during the test depth and they are.
this scale over a voltage range of specific tests are carried out has been tested at different temperatures in order to verify the accuracy of the variation due to temperature fluctuations. The scale is subjected to repeated load than half the 100,000 copies its ability to cyclic loads, without checking the accuracy to.handbook44 provides the specifications and tolerances for different classes of accuracy floor scale. Depending on the design and implementation is the balance accordingly, in consideration of the required accuracy class. There are four broad categories of accuracy class.
Class I and Class II are for laboratory and high-precision instruments. Class III devices are used for commercial purposes, such as health scale, postal scale, and the animal scale. They are all different kinds of scales. The class III includes the axle load scales, crane, cattle. Class IIII are used for heavy loads such as wheel load, axle load cell for weighing the use of high fashion. SunNTEP, it is for all producers to comply with required specifications and to ensure that end-users and customers to get accurate measurement of the weight of their NTEP floor scale, if it deems it necessary to use some commercial transactions in which the product sold by weight. You can find the latest NTEP floor scales to www.paylessscales.com.
Floor Scale
Escali Track and Target Digital Floor Scale
01 year ago
floor scale
Ultra slim USTT180 digital bathroom scale will help the user to follow their progress until the preset target weight is achieved. This scale has a large capacity of 400 lbs or 180 kilograms.
A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 8
01 year ago
Question : A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 8
As the elevator moves up, the scale reading increases to 935 N, then decreases back to 828 N. Find the acceleration of the elevator.
As the elevator approaches the 74th floor, the scale reading drops to 782 N. What is the acceleration of the elevator?
floor scale
Best answer:
Answer by M&M
Well, F=ma
since at rest, the acceleration is 9.8m/s^2 (some ppl just round to 10), you can find the mass, which would be 84.49 (if you used 9.8) or 82.8 (if you used 10)
Now that you know the mass, you can use it at different forces to determine the acceleration.
So in the first one, the new force is 935. the mass is still the same, so use F = ma again to determine the a, which would be 11.3 if you use a mass of 82.8 or 11.1 if you used 84.5.
BUT!!! you have to take in account the acceleration of gravity on the force put against the scale. So you subtract gravity away, and the acceleration is only 1.3 (regardless of which gravity and weight you used as long as you matched them)
For the second one, it’s the same but the opposite. the difference in force is the difference in acceleration.
student stands on a scale in an elevator at rest on the 64th floor of a building. The scale reads 834?
01 year ago
Question : student stands on a scale in an elevator at rest on the 64th floor of a building. The scale reads 834?
As the elevator approaches the 74th floor, the scale reading drops as low as 755 N. What is the acceleration of the elevator?
floor scale
Best answer:
Answer by bolexisist
first find the mass of the person, when the elevator is at rest the only acceleration is that of gravity
F = mg
834 = 9.81 m
m = 85 kg
next, when the elevator is moving the accel of the elevator is pointing up, while the accel of gravity is pointing down, so the total accel is the difference between the two
F = m(g – a)
F = mg – ma
755 = 834 – 85a
a = 0.93 m/s^2
Serious and lasting floor scales Johnson Scale Company
01 year ago
Johnson Scale Company offers the quality of their equipment and heavy machinery. They are proud of their reputation for high quality products and lasting high.
In the U.S. there are many manufacturers and distributors, and production of various types of floor scales. One of the most important companies, the high quality and affordable floor scales offer the Johnson Scale Company. Whether your needs are permanent or portable ladders, wet / dry applications, drop and weight, go up the ramp and the floor of the pit, all of them.
They also produced a complete and serious and permanent facilities such as drums, drum scales, floor scales, pallet scales, truck scales and a lift. This device is in its process engineering and pre-prepared with excellent performance.
Most of their best materials and equipment in large hospitals, factories, construction sites, national and international airports, used large and small grocery stores, shipping companies and cargo airlines. The company ensures that their products are all in working better and good, accurate, rugged and durable. List of Johnson Scale Co., description of equipment:
Salter PS1000 / 2000 series floor scale
Made of sturdy steel with built-in step plate protection in accidents, slips and harmful bearing flexible machine that work effectively, even rough and uneven floors can. Simple, included with adjustable foot pads, AC adapter or AA batteries, easy access to the relocation is convenient, and no ramps needed for its construction ends on the floor to be used.
Chatillon HB Portable beam scale />
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Rice Lake sailor Portable Series />
Do a barrel Cardinal Detecto Portable Scales />
Detecto portable series digital receiver />
6400 Pennsylvania Heavy Duty Floor Scale Series
It is made of heavy gauge steel with a straight pipe for intensive or industrial, construction, durable and guaranteed accuracy. There is a load cell for protection against overloads in all corners, keyboard, cables, RS-232 Gateway, LED display.
Weightronix QTLTSC verifiable forklift series
The unique design provides precise, while the truck is tilted. There are sensors weigh bar between the front and rear bumper plates scale. Sensors and angle detection circuit are good with its metal box that integrates protected by the front and black metal plates.
Sartorius – High Resolution Industrial Floor Scale with />
It is galvanized and stainless steel platforms. He is strong and flexible, better used for pharmaceutical and laboratory. It is also protected from dust and watered. It provides accurate and reliable as its own calibrations, keyboards and alphanumeric display.
portable scales
A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 8?
01 year ago
Question : A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 8?
A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 839 N.
(a) As the elevator moves up, the scale reading increases to 949 N, then decreases back to 839 N. Find the acceleration of the elevator.
(b) As the elevator approaches the 74th floor, the scale reading drops to 782 N. What is the acceleration of the elevator?
floor scale
Best answer:
Answer by kuiperbelt2003
we will apply newton’s second law; the forces acting on the scale are the normal force (up), weight (down) and these combine to produce an ma term, in other words
N-mg = ma
the scale reading measures the normal force.
if the reading at rest is 839N, the student’s mass is
839N/9.8m/s/s = 85.6kg
a) N-mg = ma
if N=949, we have
949 = mg+ma
949=85.6g+85.6a
a=1.28m/s/s in the positive direction
b) if N=782N, then
782=mg+ma
782-85.6g=85.6a
a=-0.66m/s/s (slowing down as it approaches the floor)
