Help in Engineering Mechanics Questions

In summary, the conversation discusses a scenario where a box of mass 80kg is pulled along a horizontal floor by a rope with a force of 100N, inclined at 20° to the horizontal. The first point explains that the box cannot be in equilibrium if the floor is smooth, but in this case the floor is not smooth and the box is in equilibrium. The second point involves calculating the frictional force between the box and the floor, which has a maximum value of 120N, and also the normal reaction of the floor on the box. Moving on, the third point asks for the force required to pull the box at a constant speed, while the fourth point involves calculating the acceleration of the box when the rope is pulled
  • #1
shinnsohai
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A box of mass 80kg is pulled along a horizontal floor by a rope.
The rope is pulled with a force of 100N and the rope is inclined at (20 °) to the horizontal

1. Explain Briefly why the box cannot be equilibrium if the floor is smooth.
(In Fact the floor is not smooth and the box is in equilibrium )

2. Calculate The Frictional Force Between The box and the floor and also the normal reaction of the floor on the box

The Maximum value of the frictional force between the box and the floor is 120N and the box is now pulled along the floor with the rope always inclined 20° to the horizontal

3. Calculate the force with which the rope must be pulled for the box to move at a constant speed.

4. Calculate the acceleration of the box if the rope is pulled with a force of 140N
 
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Dear Moderator ~
It seems like i'd posted in the wrong section.
What should i do?
 

1. What is Engineering Mechanics?

Engineering Mechanics is a branch of science that deals with the study of forces and their effects on objects in motion. It involves the application of mathematical and scientific principles to solve problems related to the design and analysis of structures and machines.

2. Why is Engineering Mechanics important?

Engineering Mechanics is important because it provides the foundation for understanding and analyzing the behavior of structures and machines. It is crucial in the design process of various products and structures, ensuring that they are safe and can withstand different types of forces.

3. What are the main areas of study in Engineering Mechanics?

The main areas of study in Engineering Mechanics include statics, dynamics, mechanics of materials, and fluid mechanics. Statics deals with stationary objects, dynamics involves moving objects, mechanics of materials focuses on the behavior of materials under different forces, and fluid mechanics deals with the study of fluids in motion.

4. How can I improve my understanding of Engineering Mechanics?

To improve your understanding of Engineering Mechanics, it is important to practice solving problems and applying the concepts learned in class. You can also seek help from professors or tutors, join study groups, and use online resources such as tutorials and practice quizzes.

5. What are some common applications of Engineering Mechanics?

Engineering Mechanics has various applications in different fields, such as civil engineering, mechanical engineering, aerospace engineering, and biomedical engineering. Some common applications include designing buildings, bridges, and machines, analyzing the behavior of materials under different forces, and understanding the movement of fluids in pipes and pumps.

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