Help with Vector Mechanics Question #71

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The discussion revolves around a request for assistance with question #71 from Chapter 2 of "Vector Mechanics for Engineers (Statics)" by Beer and Johnston, which involves a pulley system with a load. The original poster seeks help understanding the problem, particularly how to approach it with the added complexity of pulleys and springs. Respondents emphasize the need for the full problem statement and any relevant diagrams to provide accurate guidance. They also encourage the poster to specify which aspects of the problem are causing confusion. Clear communication of the problem details is essential for effective assistance.
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Could someone please help...?

Hi, this is my first time on the site, so tell me if i am stepping on any toes...
Can someone help me get to the answer here, i really need to understand how to do this, but i am having trouble even getting started, before i give the problem, i do understand equilibrium and vector components, just not when pulley's and springs are added in...
Out of Vector Mechanics for Engineers (Statics) Seventh Edition by Beer and Johnston, it is Chapter 2's question # 71, where a load Q is applied to a pulley C, which can roll an another pulley's line...etc etc,
any hints...?
 
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I am sorry, but do you really suppose that everyone has a copy of this particular text at hand?

Please post the problem in its entirety. ect simply does not tell us enough.
 


Hi there! Welcome to the site. I'd be happy to help you with question #71 from Chapter 2 of Vector Mechanics for Engineers (Statics). Can you please provide the full problem statement so I can better understand the scenario and give you the most accurate guidance? Also, can you specify which part you're having trouble with - the pulleys, springs, or both? This will help me give you more specific hints and clarify any concepts you may be struggling with. Looking forward to hearing back from you!
 


Hello there, welcome to the site! I would be happy to assist you with question #71 from Chapter 2 of Vector Mechanics for Engineers (Statics) by Beer and Johnston. Can you provide the specific problem statement and any diagrams or equations given in the question? This will help me better understand the problem and provide you with a clear explanation. Also, have you attempted to solve the problem yourself and encountered any specific difficulties? Let me know and I will do my best to guide you through the process. Looking forward to helping you!
 
Thread 'Variable mass system : water sprayed into a moving container'

Thread 'Variable mass system : water sprayed into a moving container'

Starting with the mass considerations #m(t)# is mass of water #M_{c}# mass of container and #M(t)# mass of total system $$M(t) = M_{C} + m(t)$$ $$\Rightarrow \frac{dM(t)}{dt} = \frac{dm(t)}{dt}$$ $$P_i = Mv + u \, dm$$ $$P_f = (M + dm)(v + dv)$$ $$\Delta P = M \, dv + (v - u) \, dm$$ $$F = \frac{dP}{dt} = M \frac{dv}{dt} + (v - u) \frac{dm}{dt}$$ $$F = u \frac{dm}{dt} = \rho A u^2$$ from conservation of momentum , the cannon recoils with the same force which it applies. $$\quad \frac{dm}{dt}...
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