Need Help, Please Physics Homework, Final tomorrow Please

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SUMMARY

The discussion focuses on solving two physics problems: calculating the tension in a clothesline with a 3kg coat causing a 5-degree sag and determining the original speed of a car that decelerates at 4 m/s² over a distance of 40 meters. For the first problem, participants emphasize the need to resolve forces along the clothesline. The second problem requires applying one of the three basic kinematics equations to find the initial speed of the car before braking.

PREREQUISITES
  • Understanding of basic physics concepts, including tension and forces.
  • Familiarity with kinematics equations, specifically the equations of motion.
  • Knowledge of vector resolution in physics.
  • Ability to perform calculations involving mass, acceleration, and distance.
NEXT STEPS
  • Study the concept of tension in strings and cables in physics.
  • Learn the three basic kinematics equations and their applications.
  • Practice problems involving vector resolution of forces.
  • Explore real-world applications of kinematics in automotive physics.
USEFUL FOR

Students studying physics, educators teaching mechanics, and anyone preparing for physics exams or needing assistance with kinematics and force resolution.

cillaxe
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1)A 3kg heavy winter coat hangs in the middle of a clothesline causing it to sag by an angle of 5 degrees. Find the tension in the clothesline.

2). A car is traveling with a constant speed when the driver suddenly applies the brakes giving the car a deceleration of 4 m/s^2. If re car. Comes to a stop in a distance of 40 meters. What was re cars original speed?
 
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Hi, the same rules apply here. You need to show your work before others can help you. The first one is just resolving forces along the clothesline. The second one requires one of the three basic kinematics equations.
 

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