A Mechanics tries to remove an engine from a car by attaching a chain

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SUMMARY

The discussion centers on calculating the tension in a chain used to remove an engine from a car, specifically when the chain makes a 15-degree angle with the vertical. The engine's mass is 180 kg, and the mechanics involved include understanding the forces acting on the chain. The tension in the chain is defined as the force transmitted through it, which is consistent throughout its length, while the horizontal force F is the external force applied to pull the chain sideways. A free body diagram (FBD) is recommended to analyze the forces acting on the system.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with tension and force concepts in physics
  • Ability to draw and interpret free body diagrams (FBD)
  • Basic knowledge of trigonometry for angle calculations
NEXT STEPS
  • Study the principles of static equilibrium in mechanics
  • Learn how to construct and analyze free body diagrams (FBD)
  • Explore the relationship between tension and angle in pulley systems
  • Review the calculations for forces acting on inclined planes
USEFUL FOR

This discussion is beneficial for physics students, mechanics, and engineers who are involved in understanding forces and tension in mechanical systems, particularly in automotive contexts.

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Homework Statement


A Mechanics tries to remove an engine from a car by attaching a chain to it from a point directly overhead and then pulling sideways with a horizontal force F. If the engine has mass 180kg, what is the tension in the chain when it makes an angle of 15 degrees with vertical? What is Force

Homework Equations



ƩF=0

The Attempt at a Solution


http://i43.tinypic.com/zl2qgh.jpg


The problem I have with the solution is that I thought because the person is pulling on the chain outward the tension would be in the opposite direction meaning toward the engine. They show T as being in the same direction the person is pulling on the chain. I feel like I have misunderstood what tension means and I would like it if someone could help me understand it.
 
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As used in this problem, the word Tension refers to the force in the chain which is everywhere the same. The word Force refers to the lateral force applied to push the chain sideways, the force F.

Draw a FBD of the point where F is applied to the chain (the block shown in the figure) and do force sums horizontally and vertically). This should give you everything that you need.
 

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