The elevator with a mass of 200 kg with an input power of 4.5 kW with a constant speed, takes 2 passengers, whose average mass is 50 kg each, from the first floor to the tenth floor of the building in 40 seconds. If the height of each floor of the building is 4 meters, how many kilowatts is the useful power of the elevator?

The elevator with a mass of 200 kg with an input power of 4.5 kW with a constant speed, takes 2 passengers, whose average mass is 50 kg each, from the first floor to the tenth floor of the building in 40 seconds. If the height of each floor of the building is 4 meters, how many kilowatts is the useful power of the elevator?

Name: The elevator with a mass of 200 kg with aninput power of 4.5 kW with
Uploaded: 2024-03-20T06:57:25.000Z
Channel: Bartleby
Description: The elevator with a mass of 200 kg with aninput power of 4.5 kW with a constantspeed, takes 2 passengers, whose averagemass is 50 kg each, from the first floor tothe tenth floor of the building in 40seconds. If the height of each floor of thebuildin

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

When its 75-kW (100-hp) engine is generating full power, a small single engine airplane with mass 700 kg gains altitude at a rate of 2.5 m/s (150 m/min, or 500 ft/min). What fraction of the engine power is being used to make the airplane climb (the rest is used to overcome drag and friction)?
If a 1300 kg car can accelerate from 30 km/h to 65 km/h in 4.0 s , how long will it take to accelerate from 65 km/h to 95 km/h ? Assume the power stays the same, and neglect frictional losses.
An electric elevator with a hoist at the top has a steel cable which weigh 3kg/m. The total height of the elevator is 30 m from the basement to the top floor. Assuming that the cable is completely wound on to the motor when the elevator is in the top floor position, determine the total work done in lifting 500 kg load from the basement to the top floor 15.
In 29.0 ms, a model train propelled by an electric motor reaches a top speed of 0.720 m/s from a resting position. The train's overall weight is 575 g. What is the motor's average output power (measured in Watts) to the train when it is accelerating?
What average mechanical power (in W) must a 60.0 kg mountain climber generate to climb to the summit of a hill of height 365 m in 49.0 min? Note: Due to inefficiencies in converting chemical energy to mechanical energy, the amount calculated here is only a fraction of the power that must be produced by the climber's body. HINT
6m/s d=10m 2m/s 37 A 1000kg car moves up an incline with initial speed 2m/s, it reach the top of the incline with speed 6m/s in 25 sec, as shown in the figure. If the coefficient of the kinetic friction between the car and the incline is 0.7, what is the average power (in kW) done by the engine of the car? (Use g=10m/s, Sin37=0.6 and Cos37=0.8) Question 4 / 13 60 m
A skier of mass 61 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull him 80 m up a 30° slope (assumed frictionless) at a constant speed of 2.9 m/s? KJ (b) What power (expressed in hp) must a motor have to perform this task? hp
A 699-kg elevator starts from rest and moves upward for 2.60 s with constant acceleration until it reaches its cruising speed, 1.83 m/s. (a) What is the average power of the elevator motor during this period? hp (b) How does this amount of power compare with its power during an upward trip with constant speed? (Give the power during an upward trip with constant speed.) hp Need Help? Read It
A skier of mass 77 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to pull hìm 45 m up a 30° slope (assumed frictionless) at a constant speed of 1.9 m/s? kJ (b) What power (expressed in hp) must a motor have to perform this task? hp
Determine the work done by an electric motor lifting an elevator and its occupants weighing 2,166 lb from the first to the fifth floor. Assume a distance of 13 ft between each floor. Compute the power requirements for the motor to go from the first to the fifth floor in the following times. Express your results in horsepower (1 hp 550 ft Ib/s). (a) 5 s x hp (b) 8 s hp
Suppose a 975-kg car can produce a useful power output of 45.5 hp (1 hp = 746 W). (a) How long, in seconds, will it take the car to reach a speed of 15.5 m/s, neglecting friction. (b) How long, in seconds, will this acceleration take if the car also climbs a 2.9-m high hill in the process?
What average mechanical power (in W) must a 61.5 kg mountain climber generate to climb to the summit of a hill of height 405 m in 46.0 min? Note: Due to inefficiencies in converting chemical energy to mechanical energy, the amount calculated here is only a fraction of the power that must be produced by the climber's body.