Solving for Net Torque: W = Torque * Distance

AI Thread Summary
The discussion revolves around calculating net torque using the formula W = Torque * distance. The user initially calculated the net torque as 0.06 but faced issues with the distance moved, initially assuming it was 2 m instead of the correct 1 m. After realizing the error, they confirmed that the torques act in the same direction. The user expressed frustration over not finding a delete option for the thread. The conversation highlights the importance of accurately interpreting problem statements in physics calculations.
minimario
Messages
95
Reaction score
2

Homework Statement



C1ywUTU.png

Homework Equations



W = Torque * distance

3. The Attempt at a Solution


The net torque is 8*.09-11*.06 = .06, and the distance moved is 4pi, because 2 full rotations, but this is not one of the choices...
 
Last edited:
Physics news on Phys.org
Edit: never mind, delete the thread. (I cannot find delete button)

Edit 2: Replaced with new problem, that I do need help with.
 
The question states that the amount of string unraveled is 1 m, not 2 m. (Oops, I did not see your second post.)
 
minimario said:
The net torque is 8*.09-11*.06 = .06, and the distance moved is 4pi, because 2 full rotations, but this is not one of the choices...

Note that the torques act in the same direction.
 
Thanks, got it now!
 
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...
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}...
Back
Top