How Do You Calculate the Tension in a Rope Holding a Suspended Box at an Angle?

  • Thread starter Thread starter fishingspree2
  • Start date Start date
  • Tags Tags
    Box
AI Thread Summary
To calculate the tension in a rope holding a 2kg box at a 37-degree angle from the vertical, the weight of the box (w = mg) is 19.6 N. The vertical component of the tension must balance this weight, leading to the equation Tsin(37) = 19.6 N. The correct tension is found to be 14.7 N after resolving the components correctly. The initial calculation of 32.5 N was incorrect due to misunderstanding the angle's impact on the vertical force balance. Accurate vector resolution is crucial for determining the correct tension in such scenarios.
fishingspree2
Messages
138
Reaction score
0

Homework Statement


A 2kg box is suspended to the ceiling using only one rope. A horizontal force keeps the rope at 37 degrees from the vertical. Find the tension of the rope


Homework Equations


w = mg
F = ma


The Attempt at a Solution


my understanding:
http://img507.imageshack.us/img507/8840/diagdd2.jpg
sum of y = Tsin37 - 2*9.8 = 0
T = 32.5 N
the correct answer is 14.7
please help:confused:
 
Last edited by a moderator:
Physics news on Phys.org
37 degrees from the vertical...you show horizontal...
 
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}...
I was thinking using 2 purple mattress samples, and taping them together, I do want other ideas though, the main guidelines are; Must have a volume LESS than 1600 cubic centimeters, and CAN'T exceed 25 cm in ANY direction. Must be LESS than 1 kg. NO parachutes. NO glue or Tape can touch the egg. MUST be able to take egg out in less than 1 minute. Grade A large eggs will be used.
Back
Top