A box weighing 100 N is at rest on a horizontal floor. The coefficient of the static friction between the box and the floor is 0.4. What is the smallest force exerted eastward and upward at an angle of 30° with the horizontal that can start the box in motion?

A box weighing 100 N is at rest on a horizontal floor. The coefficient of the static friction between the box and the floor is 0.4. What is the smallest force exerted eastward and upward at an angle of 30° with the horizontal that can start the box in motion?

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.55P: A wedge is used to prop up the 6000-lb block of marble. The wedge angle is =30, and the angle of...

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Concept explainers

Basic Terminology in Mechanics

The area of science and mathematics concerned the motion of the objects, the relation between the force matter, and motion if specified. Forces exerted over the objects result in displacements or changes in the position of an object concerning its environment. This branch of physics keeps its roots in Ancient Greece in the form of the scripts of Aristotle and Archimedes.

Question

QI:
A box weighing 100 N is at rest on a horizontal
floor. The coefficient of the static friction
F sin 6
between the box and the floor is 0.4. What is the
smallest force exerted eastward and upward at an
angle of 30° with the horizontal that can start the
box in motion?
0 34F
F cos 0

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|%EE l, I1. a T:0Y 1 aiymaatb5m تسجيل A Powetoint Presentation - Adobe acmbor Reader DC G2-bit) File Esit View Sign Window Help Home Tools PowerPrint Present. Sign In Example #4 : The coefficient of friction between the 20KN block A and the 40KN block B of Figure below is 0.40. The coefficient of friction berween block B and the horizontal plane is 0.15. Determine the force P required to cause motion of block A to impend to the right. SOLUTION : There are 2 case for this problem : Case 1 about the force P will cause motion of A to impend to the right alone without moving Block B Case 2 about the force P will cause motion of A to impend to the right with moving Block B with it in same time. تم انضمام علي عصام کاظم حميد إلى الاجتماع. ۳۷ مشارك آخر Salam عبد الوهاب أنت
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