Translational speed of a bucket

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SUMMARY

The discussion centers on calculating the torque produced by a bucket filled with water, which has a mass of 86.5 kg and is attached to a cylinder with a radius of 0.44 m. The correct formula for torque is T = mgd, leading to a calculated torque of 373.37 N*m. The initial confusion arose from misapplying the equations related to angular velocity instead of focusing on torque. The moment of inertia was also calculated using I = 2/5 mr^2, yielding a value of 0.035004816 kg*m².

PREREQUISITES
  • Understanding of torque and its calculation using T = mgd
  • Familiarity with moment of inertia and its formula I = 2/5 mr²
  • Basic knowledge of angular velocity and its relationship to linear velocity
  • Ability to apply Newton's laws in rotational dynamics
NEXT STEPS
  • Study the principles of rotational dynamics and torque calculations
  • Learn about the relationship between linear and angular motion, specifically w = v/r
  • Explore the concept of moment of inertia in different geometries
  • Investigate real-world applications of torque in mechanical systems
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Students studying physics, particularly those focusing on mechanics and rotational dynamics, as well as educators looking for practical examples of torque calculations.

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Homework Statement


A bucket filled with water has a mass of 86.5 kg and is attached to a rope that is wound around a 0.44 m radius cylinder. What torque does the bucket produce around the center of the cylinder?

Homework Equations


I=2/5 mr^2
w=v/r
mgh=1/2 mv^2+1/2lw^2


The Attempt at a Solution


i=2/5mr^2
i=2/5 3.69*.154^2=.035004816

w=square root 2*3.69*9.81*1.85/ 3.69*(.154^2+.035)=24.84951169
v=wr=24.84951169*.154=3.828776764

the worksheets online. it kepps telling me its wrong. and i tried rounding.
 
Physics news on Phys.org
The question is asking for torque and you are finding velocity.

What is the definition of torque?
 
oh. thanks i got it now.
T=mgd=86.5*9.81*.44=373.37N*m
 

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