Torque - Finding the unknown weight

  • Thread starter Thread starter ll Source ll
  • Start date Start date
  • Tags Tags
    Torque Weight
AI Thread Summary
The discussion focuses on using torque to find the weight of an unknown object attached to a pole. A 10.0 m pole weighing 20.0 N has its center of gravity 2.00 m from one end, with the unknown weight hanging at the opposite end. The balancing point is 2.00 m from the unknown weight, leading to the equation Tcw = Tccw. By solving the torque equation, the unknown weight is determined to be 60.0 N. The user expresses gratitude for the assistance received in solving the problem.
ll Source ll
Messages
13
Reaction score
0

Homework Statement


Torque is used to determine the weight of an object. A 10.0 m long pole weighing 20.0 N has its center of gravity 2.00 m from one end. An object of unknown weight is hung at the end opposite the center of gravity. With the object hanging at this end, the pole now balances 2.00 m from the unknown weight. What is the weight of the unknown weight? Ans:60.0


Homework Equations


T = F * R


The Attempt at a Solution


T = 20 * 2
= 40 ?

:(
 
Physics news on Phys.org
oh please anyone? my exams tommorow? I am sorry for being so naggy? any help AT ALL will be great. anything. I've been staring at this screen refreshing every 5 seconds.
 
PLeASE IM BeGGING YoUUUUUUUUUUUUUUUUUUUUUUUUUU
 
Ok let me have a crack at it.I assume that unknown object is at the other end of stick (not the center of gravity end). So

Tcw = Tccw
2*X = 6*20
X=60 N
 
Thank you so much. So, SO much. I love you. In a non-gay way. <3
 

Thread 'Struggling to understand the concept of this question (ice cube in water optics question)'

TL;DR Summary: I came across this question from a Sri Lankan A-level textbook. Question - An ice cube with a length of 10 cm is immersed in water at 0 °C. An observer observes the ice cube from the water, and it seems to be 7.75 cm long. If the refractive index of water is 4/3, find the height of the ice cube immersed in the water. I could not understand how the apparent height of the ice cube in the water depends on the height of the ice cube immersed in the water. Does anyone have an...
View full post »
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}...
View full post »

Similar threads

Frequency & Wavelength of a Vibrating Wire
Replies
5
Views
1K
How Can Torque Determine the Weight of an Unknown Object?
Replies
1
Views
2K
What is the torque on the bolt due to the worker and the weight of the beam?
Replies
1
Views
2K
Trouble understanding the answer to this torque question
Replies
3
Views
2K
How to find mass of a meterstick from torque
Replies
3
Views
5K
What is the torque on the right side of the stick when the center is at 50cm?
Replies
11
Views
3K
Equilibrium Problem - Balancing Torques
Replies
4
Views
3K
Where to place a weight on a bar so that the net torque is 0
Replies
5
Views
2K
Finding the mass of a ball and a rod using torque
Replies
8
Views
2K
How Do You Calculate Torque on a Wrench?
Replies
4
Views
3K

Hot Threads

Recent Insights

Back
Top