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An elevator has a weight limit of 350lbs a box of machine parts weights 25lbs which inequality best describes the maximum number of boxes b that the elevator can hold?
An elevator has a weight limit of 350 pounds a box of machine parts weighs 25 pounds which inequality best describes the maximum number of boxes b that the elevator can hold
How do elevators work?
When you step into an elevator and close the door, you had passed through two doors and are now standing in a box (or the elevator car) inside a vertical passageway (called the lift shaft). One door is in the walls of the floor that you got off, and the other door is part of the car itself.Inside the shaft are hoisting cables attached to the top of the car. The cables run over a sheave (pulley) connected to an electric motor at the top of the shaft. The other end of the cables is connected to a heavy steel weight called a counterweight. When the car goes up, the counterweight goes down; when the car goes down, the counterweight goes up.How the counterweight reduces to a minimum the power needed to operate the elevator ...Weight of counterweight = Weight of the car + (about) ½ of its maximum passenger loadSo when the elevator operates, it needs power only to lift the weight of the extra passengers in the car; the rest of the weight is balanced by the counterweight.
What material is in elevator counter weight?
A typical material is cast iron plates or blocks made for this purpose.
How do you Calculate elevator counterweight weight?
Elevator Counterweight = Half of Elevator Maximum Capacity + Cab Weight For eg: 10passenger Elevator = 10*80 = 800Kgs Counter Weight is 800/2 = 400Kgs + Cab Weight This is just to create a imbalance between Elevator cab and counterweight in order to save power in the drive.
Why is it important to design an aircraft so that its weight is distributed evenly?
It's very important when you design the plane that the plane weight is distributed evenly. The plane need it's gravity center in the center of the fuselage (On it's wings). For example: Air Midwest Flight 5481 took-off with the more weight in the tail than in the nose, the plane entered in stall 5 seconds after take-off and crashed in a hangar killing all 19 passengers and 2 crew.
What is the maximum weight on an elevator is 2000 pounds?
The maximum weight limit of the elevator is 2000 pounds. Exceeding this limit could pose a safety risk and may cause the elevator to malfunction. It is important to adhere to weight restrictions for the safety of all passengers.
How does the spring elevator mechanism work in modern buildings?
The spring elevator mechanism in modern buildings works by using a system of springs and counterweights to move the elevator car up and down. When the elevator car is loaded with passengers or cargo, the springs and counterweights help to balance the weight and make the movement smoother and more efficient. This system allows the elevator to operate with less energy and provides a more comfortable ride for passengers.
How do elevator counterweights contribute to the smooth and efficient operation of the elevator system?
Elevator counterweights help balance the weight of the elevator car, making it easier for the motor to lift and lower the car. This balancing act reduces the amount of energy needed to operate the elevator, resulting in a smoother and more efficient ride for passengers.
An elevator has a mass of 600 kg not including passengers The elevator is designed to ascend at constant speed a vertical distance of 24 m in 15 s It is driven by a motor that can provide up to 30?
power = 40hp =29828w P=work done divided by time =>P=dW/dt=F.v where f is the force and v is the velocity v=d/t=20/16=1.25m/s =>F=P/v=29828/1.25=23862.4 N This F is the force applied by the elevator to carry itself and the passengers These forces are: Weight of the elevator Wele=600*9.81=5886N Weight of the passengers Wpas=9.81m => F-Wele-Wpas=ma for this elevator to hold the maximum number of passengers it means that the force applied by the weight of the elevator plus that of the passengers must be equal to the force provided by the motor thus rendering the elevator at rest => acceleration (a)=0 =>F-Wele-Wpas=0 =>23862.4-5886-9.81m=0 =>9.81m=17976.4 =>m=1832.5kg If the average mass of a passenger is 65 =>maximum number of passengers that can ride in the elevator are 1832.5/65=28.2 => approximately 28 passengers can ride in the elevator
Does a elevator use a first class lever?
Yes, an elevator can be considered a first class lever system because the fulcrum (pivot point) is located between the effort (force applied to move the elevator car) and the load (weight of the elevator car and passengers). By adjusting the balance between the effort and the load, the elevator can move up or down effectively.
What is the maximum weight capacity that this elevator can hold?
The maximum weight capacity of this elevator is 2000 pounds.
How does the mechanism of raising an elevator work?
An elevator works by using a system of pulleys and counterweights to lift and lower the elevator car. When the elevator is called to a certain floor, an electric motor turns a pulley system that moves the car up or down along a track. The counterweight helps balance the weight of the car and its passengers, making the movement smoother and more efficient.
How are sensors used in lifts?
Sensors in lifts are used to detect the presence of passengers and provide information to the lift control system. They can help prevent elevator doors from closing on passengers, ensure that the lift car is at the correct level for boarding, and monitor weight limits to prevent overloading. Overall, sensors improve the safety, efficiency, and performance of elevator systems.
Elevator counter weight?
An elevator counterweight is a weight that is used to balance the weight of the elevator car. It is connected to the elevator car by a cable, which wraps around a pulley system. The counterweight moves in the opposite direction of the elevator car, helping to reduce the amount of energy needed to lift and lower the car.
What is the maximum weight in units of g that can be carried by the elevator?
The maximum weight that can be carried by the elevator is 1500 grams.
Does your weight change when elevator goes down?
Yes, your weight appears to decrease slightly when an elevator goes down. This is because you and the elevator experience a decrease in acceleration as the elevator descends, which temporarily reduces the force acting on your body and hence, your perceived weight.
You are standing on a scale in an elevator Suddenly you notice your weight decreases What do you conclude?
If my weight decreases while standing on the scale in an elevator, it likely means that the elevator is accelerating downward. This decrease in weight is due to the elevator and myself accelerating at the same rate, creating a sensation of weightlessness.
