A 5kg block is placed in a rough surface (u, = 0.30 and Hi = 0.25) inclined at a slope of 25 degrees and acted upon by a force, P directed 60 degrees with respect to the horizontal as shown in the figure. If the block is in impending motion to slide downwards: 60 25° a. What is the magnitude of P applied on the block? b. What is the magnitude of the friction force f,? C. If you lessen the applied force P, such that P is lower than what you computed in item a, what will happen to the value of the frictional force?

A 5kg block is placed in a rough surface (u, = 0.30 and Hi = 0.25) inclined at a slope of 25 degrees and acted upon by a force, P directed 60 degrees with respect to the horizontal as shown in the figure. If the block is in impending motion to slide downwards: 60 25° a. What is the magnitude of P applied on the block? b. What is the magnitude of the friction force f,? C. If you lessen the applied force P, such that P is lower than what you computed in item a, what will happen to the value of the frictional force?

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

Laws of Equilibrium

A body is said to be in equilibrium if the system of forces acting on the body tends to keep the body at rest, in other words, there is no translation motion or net torque on the body. Under such conditions, the equilibrium conditions are to be applied to analyze the condition. The branch of mechanics that deals with this condition is known as 'statics'. Under equilibrium, there are no net forces on the body.

Question

A 5kg block is placed in a rough surface (µs = 0.30 and Hj = 0.25) inclined at a slope of 25 degrees and
acted upon by a force, P directed 60 degrees with respect to the horizontal as shown in the figure. If the
block is in impending motion to slide downwards:
60°
25°
a. What is the magnitude of P applied on the block?
b. What is the magnitude of the friction force f,?
c. If you lessen the applied force P, such that P is lower than what you computed in item a, what
will happen to the value of the frictional force?

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