How does the mass hanging down on the bottom (Assuming frictionless environment) apply a pull force to the car? How does the weight of the object transfer to the string (tension force and maybe the pulley does something?) which pulls the car?


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    $\begingroup$ Why wouldn't it? $\endgroup$ – JMac Oct 23 '17 at 11:04
  • $\begingroup$ The pulley rotates...? You need to clarify why you have an issue with this. $\endgroup$ – JMLCarter Oct 23 '17 at 12:06
  • $\begingroup$ Basically, I am wondering how the vertical force gets transformed into a horizontal one. $\endgroup$ – Legoboy0215 Oct 23 '17 at 12:30

I wonder if the following diagram is helpful:

enter image description here

There is a force from the pulley on the string - that is what allows the tension to "turn the corner" so the force from the weight (which is downwards) is turned into a horizontal force (tension that can pull the cart).

  • $\begingroup$ Is the force applied by the pulley distributed evenly across the two ends of the string? $\endgroup$ – Legoboy0215 Oct 23 '17 at 12:32
  • $\begingroup$ I'm not sure I understand your question. The force is not "across the ends of the string", it is "on the string". $\endgroup$ – Floris Oct 23 '17 at 12:38
  • $\begingroup$ Oh, I didn't know that. Thanks! Last question - Is the weight of the item simply just the same as the force of the pull on the car? $\endgroup$ – Legoboy0215 Oct 23 '17 at 12:42
  • $\begingroup$ If there is no friction in the pulley, then yes. $\endgroup$ – Floris Oct 23 '17 at 12:42

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