Q1) An elevator car has a mass of (1600 kg) and is carrying passengers having a combined mass of (200 kg). A constant friction force of (4000 N) retards its motion upward, as shown in figure. (A) What power delivered by the motor is required to lift the elevator car at a constant speed of 3 m/s? (B) What power must the motor deliver at the instant the speed of the elevator is v if the motor is designed to provide the elevator car with an upward acceleration of 1 m/s2? Motor

Q1) An elevator car has a mass of (1600 kg) and is carrying passengers having a combined mass of (200 kg). A constant friction force of (4000 N) retards its motion upward, as shown in figure. (A) What power delivered by the motor is required to lift the elevator car at a constant speed of 3 m/s? (B) What power must the motor deliver at the instant the speed of the elevator is v if the motor is designed to provide the elevator car with an upward acceleration of 1 m/s2? Motor

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: Consider the following diagram. m1320 kg and m2= 10 kg. The system is being pulled by an applied…

Q: Tarzan, who weighs 669 N, swings from a cliff at the end of a convenient vine that is 21 m long.…

A: Given data: Weight of Tarzan (w) = 669 N Length of convenient vane = 21 m Strength of vine = 950 N…

Q: 300 lb 30° AT 40 lb T 300 lb 34P Sürtünmesiz makaraların olduğu yukarıdaki sistemde her iki tarafa…

Q: A block of mass m = 1.40 kg is at rest on a ramp of mass M = 3.90 kg which, in turn, is at rest on a…

A: Given Data: The mass of the block is m=1.40 kg. The mass of the ramp is M=3.90 kg. The displacement…

Q: A block with a mass of m = 1.8 kg rests on a wooden plank. The length of the wooden plank is 20 m…

Q: Two blocks, A and B, are attached to one another by a rope that passes over a frictionless pulley as…

A: Mass of block A = 4kgMass of block B = 6kgCoefficient of friction = 0.14Cylinder radius =…

Q: Penny is adjusting the position of a stand up piano of mass mp = 155 kg in her living room. The…

Q: Block A in the figure weighs 1.16 N and block B weighs 3.62 N. The coefficient of kinetic friction…

A: According to the given data WA=1.16 N WB=3.62N μ=0.293 We need to find (a) Find the magnitude of the…

Concept explainers

Forming and Shaping

Metal forming is a category of metalworking process through which the material can be given the desired shape and size by subjecting it to plastic deformation, where the component undergoes bulk deformation process upon application of loads. Unlike the shearing and machining process, the material does not undergo up to a failure point as indicated in the stress-strain curve. Hence, the stresses induced during the forming process are greater than yield strength but less than the failure strength of the material. The process does not lead to the loss of material, so it can be said to be an economical process. During forming, the material is subjected to tensile forces, compressive forces, bending, and shearing loading conditions. The material should possess the property of ductility to undergo the forming process.

Question

Q1) An elevator car has a mass of (1600 kg) and is carrying passengers having a
combined mass of (200 kg). A constant friction force of (4000 N) retards its motion
upward, as shown in figure.
(A) What power delivered by the motor is required to lift the elevator car at a
constant speed of 3 m/s?
(B) What power must the motor deliver at the instant the speed of the elevator is v if
the motor is designed to provide the elevator car with an upward acceleration of 1
m/s2?
Motor
Mg

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

An Olympic lifter (m = 103kg) is holding a lift with a mass of 350 kg. The bar exerts a purely vertical force that is equally distributed between both hands. Each arm has a mass of 9 kg, are 0.8m long and form a 40° angle with the horizontal. The CoM for each arm is 0.5 m from hand. Assuming the lifter is facing us in the diagram below, his right deltoid inserts 14cm from the shoulder at an angle of 13° counter-clockwise from the humerus. Find the force right deltoid
A train has a weight of 100 tons (2,000lbf) is stopped from 4 mph in 1 ft by a hydraulic cushion.If rolling friction is 0.05 of the car weight, Find: • The stopping force using the gs method • The stopping force using the energy method
There is a box with height 1.2 m, width 0.8 m and mass 50 kg. It contains a very expensive equipment, which cannot be tilted while moving. There is a rope connected to the top-right corner of the box that you can pull with. The static friction coefficient between the floor and the box is 0.4. Assuming the rope angle θ is 30 degrees and m/s2. a) Is it possible to move the box using the rope without tilting the box? (need to show details) b) What is the minimum force required to move the box on the floor?
Work-energy principle A 10 lb package moves down a conveyor belt and transition to a ramp. The angle of both the conveyor belt and the ramp = 12 degrees. (The length of the ramp = 10 ft (This is different than in the figure). The coefficient of kinetic (sliding) friction is mu_k = 0.40. Compute the work done by the friction as it slides on the ramp. Compute the height difference from the top to the bottom of the ramp. Compute the gravitational potential energy at the top relative to the bottom. The velocity at the end of the ramp = 2 ft/s. Compute the kinetic energy at the bottom. Use the work-energy principal to compute the kinetic energy at the top of the beginning of the ramp. Then, compute what the velocity at the top must have been.
Example 3.6.2 We have two toy rail cars. Car 1 of mass 2 kg is traveling at 3 towards the second rail car of mass S 1 kg. There is a bumper on the second rail car that engages at the moment the cars hit (it connects to two cars) and does not let go. The bumper acts like a spring of spring constant k =2. The second N car is 10 meters from a wall. See the following figure. Show solution 10 meters We want to ask several questions. At what time after the cars link does impact with the wall happen? What is the speed of car 2 when it hits the wall? Exercise 3.6.2 PP21 k www.mz m Suppose in Example 3.6.2 the second car is moving to the left at 3 - at the time of impact. Find the behavior of the system after linkup: S Hint At first, the second car will start moving to the left, but then it will move to the right for while. When is the next time t that the second car will start moving to the left?
A spring is used to stop a 32 kg metal sphere which is moving down a 30° incline, as shown in Figure Q2(a). The spring has a constant k = 33 kN/m and initially compressed 50 mm. Given that the velocity of the metal sphere is 5.5 m/s when it is 5 m from the spring and the friction can be neglected. (Gravity g = 9.81 m/s?) Q2. (a) Determine all the kinetic and potential energy components at the initial (i) and final position of the metal sphere. (Let the x be the additional compression of the spring). (ii) Calculate the maximum additional deformation of the spring requires to bring the metal sphere to rest. (iii) Determine after the metal sphere come into rest will it rebound upwards the slope or not? if can how much it will move up again the slope until it temporary at reset otherwise stated the reason why the metal sphere would stay at rest. 5.5m/s m=32kg 5m 30 Figure Q2(a)
A propeller shaft subjected to combined torsionand axial thrust is designed to resist a shear stress of57 MPa and a compressive stress of 105 MPa (see figure).(a) Determine the principal stresses and show themon a sketch of a properly oriented element.(b) Determine the maximum shear stresses andassociated normal stresses and show them on asketch of a properly oriented element.
Consider a uniform ladder of length 4.3 m and mass 10 kg. The ladder is falling over, pivoting about the end that is touching the ground. Someone is pushing on the top end of the ladder with a horizontal force of size 415 N. At the instant when the ladder makes a 46 degree angle with the horizontal, calculate the net torque on the ladder about its bottom end, in N m. Make your answer positive, and use g = 10 m/s2. (Please answer to the fourth decimal place - i.e 14.3225)
please answer this question with explination. many thanks !
A 35-kg child rides on a 10-kg bicycle with 500-mmdiameter wheels. Determine the horizontal force necessary to push the child and bicycle On a level sidewalk.Neglect all friction except rolling resistance.
Consider the mass-on-a-spring system as shown in the figure below. The spring has a spring constant of 1.86e+3 N/m, and the block has a mass of 1.39 kg. There is a constant force of kinetic friction between the mass and the floor of 4.71 N. Starting with the spring compressed by 0.117 m from its equilibrium position, how far will the block travel once it leaves the spring? (Assume that block leaves the spring at the spring's equilibrium position, marked x=0 in the figure. Give your answer as the distance from the equilibrium position to the final position of the block.) Hint: How much work must friction do in order to bring the mass to a stop? How much distance is required for friction to do this work? Enter answer here www.m X = 0 Please enter a numerical answer below. Accepted formats are numbers or "e" based scientific notation e.g. 0.23, -2, 1e6, 5.23e-8 Image size: S M L Max m