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Work done in climbing the hill

  1. Jan 23, 2014 #1
    Suppose a man is climbing up a hill at angle 30 degree from the ground. The mass of the man is 50Kg and he climbs up the hill at uniform acceleration of 2m/s2.

    What is the work done in climbing up the hill and if he climbs down the hill at the same 30 degree angle with uniform acceleration of 2m/s2, what is the work done in climbing down the hill.

    Thank you.
     
  2. jcsd
  3. Jan 24, 2014 #2

    Simon Bridge

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    That's an interesting question - how have you been attempting it so far?
    How are you thinking about it?

    Were you supplied with any other information - like the time spent climbing or the height of the hill?
     
  4. Jan 24, 2014 #3
    I have been thinking it in terms of Work done=Force * Displacement.

    I guess we should use scalar product of vectors.Distance is along the ground and force is along the line which is 30degrees from the ground.
     

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  5. Jan 24, 2014 #4

    Simon Bridge

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    Sure, you can get the net force from F=ma.
    What's the total applied force doing the work though?

    Do you know how to find the distance moved?

    OTOH: you can use the work-energy theorem.
     
  6. Jan 24, 2014 #5

    Simon Bridge

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    Sure, you can get the net force from F=ma.
    What's the total applied force doing the work though?

    Do you know how to find the distance moved?

    OTOH: you can use the work-energy theorem.
     
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