(Q) Find the maximum speed at which a truck can safely travel without toppling over, on a curve of radius 250m. The height of the centre of gravity of the truck above the ground is 1.5m and the distance between the wheels is 1.5m, the truck being horizontal.

I actually can't figure out which force acts as the centripetal force in the question. Also since it is a truck so it can't lean, so I can't apply the method we generally use in leaning of cycle. Also no friction is described here between the road and wheels.

My progress till now

  • $\begingroup$ I apologize if my question looks of topic but I have already tried to solve this question several times before asking it here. And also I have just asked an approach for such questions. BTW this isn't a home work, I was just practicing some physics for my upcoming exam. $\endgroup$ Sep 21 '13 at 0:31
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    $\begingroup$ Hi Abhishek Verma. Welcome to Phys.SE. If you haven't already done so, please take a minute to read the definition of when to use the homework tag, and the Phys.SE policy for homework-like problems. $\endgroup$
    – Qmechanic
    Sep 21 '13 at 10:31
  • $\begingroup$ I apologize again, @Qmechanic, for any violation of rules. But my examinations are knocking my doors and I don't have much time for reading about the homework tag. I hope you will understand. I promise I will read about homework tag after the examinations. $\endgroup$ Sep 21 '13 at 10:41
  • $\begingroup$ I don't understand what's wrong with my question, it's just the fact that I don't get much of physics and my examinations are near and that shouldn't be the reason for such a disregard. I respect Lubos for suggesting me an answer. But the answer didn't explain my confusions. Neither I am 'cheating' nor this is an 'homework' question by any means! I had expectations with this site. $\endgroup$ Sep 21 '13 at 11:59
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    $\begingroup$ It IS a homework question by the standards of this site. Even though it isn't actual homework it will be tagged homework because: "A "homework question" is any question whose value lies in helping you understand the method by which the question can be solved, rather than getting the answer itself. This includes not just questions from actual homework assignments, but also self-study problems, puzzles, etc." $\endgroup$
    – Michiel
    Sep 21 '13 at 12:32

It's not a good idea to fully solve the homework problems for users because this is not a website for cheating, it's a website helping people to understand physics or make progress with some physics research. But you may find an analogous problem dedicated to the recent train crash in Spain discussed here:


  • $\begingroup$ I am afraid that won't help anyway. I have updated the question, can you please have a look at it. $\endgroup$ Sep 21 '13 at 10:17

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