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A block of length 0.5 m and width 0.3 m is being pulled along a horizontal surface lubricated by a 2 mm layer of oil as shown in Figure Q1. The speed of the block is 6 m s' and the viscosity of the oil is 0.3 Pa s. 1. 6 ms Figure Q1 (not to scale) oll (a) Calculate the magnitude of the force F required to keep the block moving at this constant speed. (b) Calculate the rate of energy dissipated by the viscous forces. (c) The energy is dissipated mostly as heat. What effect is this likely to have?

A block of length 0.5 m and width 0.3 m is being pulled along a horizontal surface lubricated by a 2 mm layer of oil as shown in Figure Q1. The speed of the block is 6 m s' and the viscosity of the oil is 0.3 Pa s. 1. 6 ms Figure Q1 (not to scale) oll (a) Calculate the magnitude of the force F required to keep the block moving at this constant speed. (b) Calculate the rate of energy dissipated by the viscous forces. (c) The energy is dissipated mostly as heat. What effect is this likely to have?

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A block of length 0.5 m and width 0.3 m is being pulled along a horizontal surface lubricated by a 2 mm layer of oil as shown in Figure Q1. The speed of the block is 6 m s and the viscosity of the oil is 0.3 Pa s. 1. 6 ms Figure Q1 (not to scale) oil (a) Calculate the magnitude of the force F required to keep the block moving at this constant speed. (b) Calculate the rate of energy dissipated by the viscous forces. (c) The energy is dissipated mostly as heat. What effect is this likely to have?
Transcribed Image Text:A block of length 0.5 m and width 0.3 m is being pulled along a horizontal surface lubricated by a 2 mm layer of oil as shown in Figure Q1. The speed of the block is 6 m s and the viscosity of the oil is 0.3 Pa s. 1. 6 ms Figure Q1 (not to scale) oil (a) Calculate the magnitude of the force F required to keep the block moving at this constant speed. (b) Calculate the rate of energy dissipated by the viscous forces. (c) The energy is dissipated mostly as heat. What effect is this likely to have?
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