- #1
Analysis of Curve Trajectory - Is It Correct?
- Thread starter firavia
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The analysis presented in the image is questioned for its accuracy regarding curve trajectory. It is clarified that if a second force is applied at the center of mass, it will result in downward acceleration without causing torque. However, if the force is applied forward of the center of mass, it will induce both downward acceleration and torque, leading to rotation of the ship. The discussion emphasizes that the placement of the thruster determines the outcome, with two distinct scenarios based on its position. Understanding these dynamics is crucial for accurate analysis of reaction control systems.
- #2
flatmaster
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- #3
- #4
flatmaster
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#2 as long as the second force is applied at the center of mass. If it's applied foreward of the center of mass, it will not only cause the townward acceleration, but also the torque that would rotate the ship.
Basically, as you drew it, #2 is the solution. If you move the thruster foreward on the ship, #1 is the solution.
Basically, as you drew it, #2 is the solution. If you move the thruster foreward on the ship, #1 is the solution.
- #5
Doc Al
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See the discussion in this thread: https://www.physicsforums.com/showthread.php?t=329434
The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
Hello!
I have a question regarding a beam on an inclined plane. I was considering a beam resting on two supports attached to an inclined plane. I was almost sure that the lower support must be more loaded. My imagination about this problem is shown in the picture below.
Here is how I wrote the condition of equilibrium forces:
$$
\begin{cases}
F_{g\parallel}=F_{t1}+F_{t2}, \\
F_{g\perp}=F_{r1}+F_{r2}
\end{cases}.
$$
On the other hand...
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