The 39-kg crate is stationary when the force P is applied. Determine the resulting acceleration of the crate if (a) P = 0, (b) P = 161 N,and (c) P = 328 N. The acceleration is positive if up the slope, negative if down the slope.PPart 121°P39 kg.Part (a). We need to decide if the block moves. The easy way to make this decision is to assume that the block does not move andthen to test this assumption. If P = 0, what friction force F is needed to keep the block from moving?Answer: F=mgHg = 0.31μ = 0.22NN

When the block will not move then coefficient of static friction will come into picture and when the…

Part 1 Part (a). We need to decide if the block moves. The easy way to make this decision is to assume that the block does not move and then to test this assumption. If P = 0, what friction force F is needed to keep the block from moving? F Answer: F= i mg N N

Part 1 Part (a). We need to decide if the block moves. The easy way to make this decision is to assume that the block does not move and then to test this assumption. If P = 0, what friction force F is needed to keep the block from moving? F Answer: F= i mg N N

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

System of Forces

A force is an external influence or agent that changes the state of a system. According to Newton's second law, the force applied to a body is proportional to the change in momentum of a body. Hence, whenever a force is applied to a body, its momentum changes. If the body is at rest, under the action of force, its state of rest changes to motion. In other words, the magnitude of the momentum of the body changes from zero to a measurable value. Similarly, if the body possesses some initial velocity, it has some associated momentum, the effect of force can cause the body to halt or come to rest, that is, the momentum reduces to zero.

Question

The 39-kg crate is stationary when the force P is applied. Determine the resulting acceleration of the crate if (a) P = 0, (b) P = 161 N,
and (c) P = 328 N. The acceleration is positive if up the slope, negative if down the slope.
P
Part 1
21°
P
39 kg.
Part (a). We need to decide if the block moves. The easy way to make this decision is to assume that the block does not move and
then to test this assumption. If P = 0, what friction force F is needed to keep the block from moving?
Answer: F=
mg
Hg = 0.31
μ = 0.22
N
N

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