13-2 | Kinetics of a Particle | Chapter 13: Hibbeler Dynamics 14th ed | Engineers Academy

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Chapter 13: Kinetics of a Particle : Force and Acceleration
Hibbeler Dynamics 14th ed

13–2. The two boxcars A and B have a weight of 20 000 lb and 30 000 lb, respectively. If they are freely coasting down the incline when the brakes are applied to all the wheels of car A, determine the force in the coupling C between the two cars. The coefficient of kinetic friction between the wheels of A and the tracks is uk= 0.5. The wheels of car B are free to roll. Neglect their mass in the calculation.
Suggestion: Solve the problem by representing single
resultant normal forces acting on A and B, respectively.

#EngineeringMechanics #Dynamics #Hibbeler #Chapter13 Hibbeler Statics - Chapter Playlists
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شكرا استاذ لقد نجحت بالامتحان واخذت امتياز بالميكانيك الهندسي والفضل لله ولك ان شاء الله في ميزان حسناتك

Hh-cdkc
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Why didn't you calculate the frictions just for Car A but not for both cars?

baker
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Why did u take the y component as a cosine and the x component as a sine

yordanoskefyalew-iylx
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why you dont multiply the mass to 9.81?

LemuelJefferson
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brooo what is that 20000lb over 32.2. lb is already both MASS and force unit. you can't say 20000lb/32.2 is mass. masss is already 20000lb . but you can and need to say is i did this because its just find right kind of acel unit. which is ft/s^2f

emin
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liar. not all problems solved. disappointed.

sierraturrell