A 50-cm x 30-cm x 20-cm block weighing W is to be moved at a constant velocity of 0.80 m/s on an 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 t-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. 50 cm 20⁰ 30 cm Last 2 digit of YorkU ID# >= 50 t (mm) 0.25 Last 2 digit of YorkU ID# 0.20 <50 V = 0.8 m/s W (N) 400 500

A 50-cm x 30-cm x 20-cm block weighing W is to be moved at a constant velocity of 0.80 m/s on an 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 t-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. 50 cm 20⁰ 30 cm Last 2 digit of YorkU ID# >= 50 t (mm) 0.25 Last 2 digit of YorkU ID# 0.20 <50 V = 0.8 m/s W (N) 400 500

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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Concept explainers

British Gravitational Bg System Of Units

Measuring is the comparison of a particular physical quantity with its reference value. A unit is a fixed physical quantity. The length is a physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with. 

Question

A 50-cm x 30-cm x 20-cm block weighing W is to be moved at a constant velocity of 0.80 m/s
on an 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 t-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.
50 cm
20⁰
30 cm
Last 2 digit of YorkU ID#
>= 50
t (mm)
0.25
Last 2 digit of YorkU ID# 0.20
<50
V = 0.8 m/s
W (N)
400
500

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