A 5000 N weight is pulled up on an inclined surface at a constant speed by a cylinder as shown in the figure. The coefficient of kinetic friction between the weight and the inclined surface is Hik = 0.15. The cylinder is such that the piston diameter is D, = 8 cm and the rod diameter is D, = 3 cm. a) Determine the pressure needed to move the weight at a constant speed. b) What would be the speed of the weight if a flow rate of 0.0075 m³/s is provided by the pump? c) Compute the power required by the pump neglecting any losses in kW. 5000 N 35°

A 5000 N weight is pulled up on an inclined surface at a constant speed by a cylinder as shown in the figure. The coefficient of kinetic friction between the weight and the inclined surface is Hik = 0.15. The cylinder is such that the piston diameter is D, = 8 cm and the rod diameter is D, = 3 cm. a) Determine the pressure needed to move the weight at a constant speed. b) What would be the speed of the weight if a flow rate of 0.0075 m³/s is provided by the pump? c) Compute the power required by the pump neglecting any losses in kW. 5000 N 35°

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,...

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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

A 5000 N weight is pulled up on an inclined surface at a constant speed by a
cylinder as shown in the figure. The coefficient of kinetic friction between the
weight and the inclined surface is Hik = 0.15. The cylinder is such that the piston
diameter is D, = 8 cm and the rod diameter is D, = 3 cm.
a) Determine the pressure needed to move the weight at a constant speed.
b) What would be the speed of the weight if a flow rate of 0.0075 m³/s is
provided by the pump?
c) Compute the power required by the pump neglecting any
losses in kW. HXE
5000 N
35°

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