A 50-cm x 30-cm x 20-cm block weighing 150 N is to be moved at a constant velocity of 0.8 m/s on inclined surface with a friction coefficient of 0.27. (a) Determine the force F that needs to be applied in the horizontal direction. (b) If a 0.4-mm-thick oil film with a dynamic viscosity of 0.012 Pa.s is applied between the block and inclined surface, determine the percent reduction in the required force. V= 0.8 m/s 50 cm 30 cm 20 150 N

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A 50-cm x 30-cm x 20-cm block weighing 150 N is to be
moved at a constant velocity of 0.8 m/s on inclined surface
with a friction coefficient of 0.27. (a) Determine the force F
that needs to be applied in the horizontal direction. (b) If a
0.4-mm-thick oil film with a dynamic viscosity of 0.012 Pa.s
is applied between the block and inclined surface, determine
the percent reduction in the required force.
V= 0.8 m/s
50 cm
30 cm
F
20
150 N
Transcribed Image Text:A 50-cm x 30-cm x 20-cm block weighing 150 N is to be moved at a constant velocity of 0.8 m/s on inclined surface with a friction coefficient of 0.27. (a) Determine the force F that needs to be applied in the horizontal direction. (b) If a 0.4-mm-thick oil film with a dynamic viscosity of 0.012 Pa.s is applied between the block and inclined surface, determine the percent reduction in the required force. V= 0.8 m/s 50 cm 30 cm F 20 150 N
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