Results 1 to 3 of 3

Math Help - Physics - Power

  1. #1
    Junior Member
    Joined
    Oct 2007
    Posts
    69

    Physics - Power

    Not even sure where to start with this one :\

    Water flows over a section of Niagara Falls at
    a rate of 1.4 x 10^6 kg/s and falls 59 m.
    The acceleration of gravity is 9.8 m/s^2.
    What is the power wasted by the waterfall?
    Answer in units of W.
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Senior Member JaneBennet's Avatar
    Joined
    Dec 2007
    Posts
    293
    In one second, 1.4\times10^6\ \textrm{kg} of water passes through that particular section. The work done by gravity on this mass of water as it falls through 59\ \textrm{m} is 1.4\times10^6\times9.8\times59=8.0948\times10^8\ \textrm{J}. This is the amount of energy “wasted” per second; hence the power wasted by the waterfall is 8.0948\times10^8\ \textrm{W}.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Oct 2007
    Posts
    69
    Thanks man. I haven't worked with power before but I'm starting to see how the whole thinking process works now, thanks a bunch
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Got a physics question or interested in physics?
    Posted in the Math Topics Forum
    Replies: 16
    Last Post: February 3rd 2014, 01:56 AM
  2. Elevator work, power [Physics]
    Posted in the Math Topics Forum
    Replies: 3
    Last Post: April 19th 2009, 05:49 PM
  3. how do solve quantum physics or physics equations
    Posted in the Advanced Applied Math Forum
    Replies: 2
    Last Post: March 26th 2008, 04:33 AM
  4. Physics - Power
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: March 5th 2008, 11:28 AM
  5. physics skier average power problem
    Posted in the Math Topics Forum
    Replies: 4
    Last Post: November 10th 2007, 04:33 AM

Search Tags


/mathhelpforum @mathhelpforum