6. A motor winds the rope in B with a constant acceleration aB. Because of the pulley system, the mass m in A slides in this way to the left over a horizontal axis. Between m and the left end point of the horizontal axis, there is a spring (constant k, unstretched length l6). The coefficient of kinetic friction between m and the axis is µk. When Sa equals 1.5 m, vB equals 6 m/s. For this situation: a) determine at that instant the velocity Va and the acceleration aa of A, b) determine all the forces that apply on A, c) determine the force with which the motor pulls the rope. Data: ав 3 2 m/s2, m = 2 kg, k 150 N/m, l 2 m, µk = 0.3 %3D SA 2 m

6. A motor winds the rope in B with a constant acceleration aB. Because of the pulley system, the mass m in A slides in this way to the left over a horizontal axis. Between m and the left end point of the horizontal axis, there is a spring (constant k, unstretched length l6). The coefficient of kinetic friction between m and the axis is µk. When Sa equals 1.5 m, vB equals 6 m/s. For this situation: a) determine at that instant the velocity Va and the acceleration aa of A, b) determine all the forces that apply on A, c) determine the force with which the motor pulls the rope. Data: ав 3 2 m/s2, m = 2 kg, k 150 N/m, l 2 m, µk = 0.3 %3D SA 2 m

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 7.48P: Find the smallest distance d for which the hook will remain at rest when acted on by the force P....

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Question

Help please

6. A motor winds the rope in B with a constant acceleration aB. Because of the
pulley system, the mass m in A slides in this way to the left over a horizontal
axis. Between m and the left end point of the horizontal axis, there is a spring
(constant k, unstretched length l). The coefficient of kinetic friction between m
and the axis is Pk. When Sa equals 1.5 m, VB equals 6 m/s. For this situation:
a) determine at that instant the velocity vA and the acceleration aa of A,
b) determine all the forces that apply on A,
c) determine the force with which the motor pulls the rope.
Data: ав 3
2 m/s2, m =
2 kg, k = 150 N/m, l
2 m, µk = 0.3
%D
В
SA
2m

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