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Timmy in the well question...... can anyone explain this to me? Watch

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    Little Timmy has fallen down the well! To get him out, rescue workers lower a rope attached to a machine and Timmy ties it around his waist. The machine reels in the rope at a slow steady rate. Timmy weighs 250 N, which means gravity pulls him downward with a force of magnitude 250 N.

    1. As Timmy is pulled upward at a constant speed, does the rope exert an upward force greater than, less than, or equal to 250 N? Explain your reasoning.


    I don't know what the answer is, and I need someone to explain this to me. Anyone?! Please help.
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    I think the answer is constant.
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    so like, greater than?
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    Equal.
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    would it be too much if I asked you to explain?
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    (Original post by Loststudenttgu)
    Little Timmy has fallen down the well! To get him out, rescue workers lower a rope attached to a machine and Timmy ties it around his waist. The machine reels in the rope at a slow steady rate. Timmy weighs 250 N, which means gravity pulls him downward with a force of magnitude 250 N.

    1. As Timmy is pulled upward at a constant speed, does the rope exert an upward force greater than, less than, or equal to 250 N? Explain your reasoning.


    I don't know what the answer is, and I need someone to explain this to me. Anyone?! Please help.
    An object travelling at constant velocity (i.e. speed and direction) must have no net force upon it (essentially Newton's first law, although his second is more general). Timmy therefore must have a force(s) that cancel his weight, which is provided by the tension in the rope in this case.
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    (Original post by RogerOxon)
    An object travelling at constant velocity (i.e. speed and direction) must have no net force upon it (essentially Newton's first law, although his second is more general). Timmy therefore must have a force(s) that cancel his weight, which is provided by the tension in the rope in this case.
    Thank you so much!!!
 
 
 
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