A71-kg woman holds a 9-kg package as she stands within an elevator which briefly accelerates upward at a rate of 0.16g. Determine the force R which the elevator floor exerts on her feet and the lifting force L which she exerts on the package during the acceleration interval. If the elevator support cables suddenly and completely fail, what values would R and L acquire?

A71-kg woman holds a 9-kg package as she stands within an elevator which briefly accelerates upward at a rate of 0.16g. Determine the force R which the elevator floor exerts on her feet and the lifting force L which she exerts on the package during the acceleration interval. If the elevator support cables suddenly and completely fail, what values would R and L acquire?

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.78P: The figure shows a steel bar being processed by a rolling mill. Given that P=80kN and r =0.016,...

See similar textbooks

Similar questions

Your answer is partially correct. A 57-kg woman holds a 5-kg package as she stands within an elevator which briefly accelerates upward at a rate of 0.21g. Determine the force R which the elevator floor exerts on her feet and the lifting force L which she exerts on the package during the acceleration interval. If the elevator support cables suddenly and completely fail, what values would R and L acquire? 5kg 0.21g 57kg Answers: While accelerating, R = i 127.73 N L= i 10.3005 N After the cables fail, R= N L = N
A 79-kg woman holds a 7-kg package as she stands within an elevator which briefly accelerates upward at a rate of 0.27g. Determine the force R which the elevator floor exerts on her feet and the lifting force L which she exerts on the package during the acceleration interval. If the elevator support cables suddenly and completely fail, what values would R and Lacquire? 7kg 0.27g 79kg Answers: While accelerating, R = i N L= i N After the cables fail, R= i N L= N
F m1, m2 two blocks connected by a spring.png Two blocks are connected by an ideal spring on a frictionless floor as shown above. Force F is applied to the block with mass m2. If k is the spring constant, x=|L-Lol is the amount of the stretch/compression of the spring, and g is the free fall acceleration, what is a correct equation for the magnitude of the net force acting on block m2? Check all what applies. m1 F(1 - :) mi+m2 O F-m2a m2 F(1 mi+m2 O (m1+m2)a F-kx
Khufra works at a spring factory and he was assigned to test a certain spring, whose constant is 50 N/m attached to a 50-kg block in an incline (©=30°). With the spring initially at equilibrium position, the block was pushed 0.3 meters up the incline by a 50-N external force applied parallel to the path. The coefficient of kinetic friction is 0.30. d) How much work is done by the block (in Joules) on the spring? e) How much work is done by the applied push on the block? f) How much work is done by friction?
A Wm 729-N weight man stands on a spring scale in an elevator. During the first 3 seconds of motion from rest, the tension Tin the hoisting cable is 8,704 N. Find the reading R of the scale in newtons during this interval. The total weight of the elevator, man, and scale is Wt 7,006-N. y 1 y T WT R Wm
A block of mass m1=6 kg rests on another block of mass m2=20.1 kg and the two are connected by a massless cord passing through a pulley of negligible mass. If there is no friction anywhere in the system, what force F (magnitude) must be applied to m2 so that mjaccelerates to the right at 6.5 m/s2. Express your answer in units of N using zero decimal place. If you need to, take g=9.80 m/s2. m1 m2
A 2.00-kg block is pushed against a spring with negligible mass and force constant compressing it 0.220 m. When the block is released, it moves along a frictionless, horizontal surface and then up a frictionless incline with slope 370. How far does the block travel up the incline before starting to slide back down? А. 1.16 m k= 400 N/m m= 2.00 kg B. 0.82 m 37.0° K-0.220 m С. 3.1 m D. 1.2 m Е. 2 m
Khufra works at a spring factory and he was assigned to test a certain spring, whose constant is 80 N/m, attached to a 22-kg block in an incline (0 = 55°). With the spring initially at equilibrium position, the block was pushed 0.5 meters up the incline by a 42-N external force applied parallel to the path. If the coefficient of kinetic friction is 0.3, determine the work done by the spring (in Joules). Use g = 9.81 m/s². CO
Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A 4.5-kg block rests on top of a 2-kg block attached to a spring of constant 40 N/m. The upper block is suddenly removed. M 2 kg www Determine the maximum speed reached by the 2-kg block. The maximum speed reached by the 2-kg block is 2.59 m/s. Determine the maximum height reached by the 2-kg block. The maximum height reached by the 2-kg block is m. * www
Q1/ A man of mass 75 kg ,and woman of mass 55 kg stand facing each other on an ice rink ,both wearing ice skates. The horizontal force of F=85 N in the positive x-direction Assume the ice is woman pushes the man with a Frictionless. a-what is the man's acceleration. b- what is the reaction force on acting on the woman. c-what is the woman's acceleration. Q2/ A force of 10 N acts on a body of mass 2 kg . what is : a- The acceleration of body. b- Its weight in Newton. c- Its acceleration if the force is double. Q3/ A 3 kg particle starts from rest and moves a distance of 4 m in 2 sec under the action of a single constant force. find the magnitude of the force ? Q4/ A 6 kg object undergoes an acceleration of 2 m/sec² . a- What is the magnitude of the resultant force acting on it ? b- If this same force is applied to a 4 kg object, what acceleration will it produce?
A box of mass 20 kg moves up a rough plane which is inclined to the horizontal at 25.0o .It is pulled by a horizontal force F of magnitude 250N . The Coefficient of kinetic friction between thr box and the plane is 0.300 a) if the box travels 3.80 m along the plane determine i. The work done on the box by the force F ii. The work done on the box by gravitational force iii. The work done on the box by reaction force and the work done on the box by frictional force v. total work done on the box b) If the speed of box is zero at bottom plane ,calculate it speed when it travellef 3.80 m (given g=9.81m/s2)
a 322-lb body moves under the action of a force given by the relation P = (10t-t^2)î, where P is in pounds and t is in seconds. How far will the body move from rest before it starts to reverse its direction? answer=140.8 ft