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Waves and wave equations

  • 04-11-2006 7:36pm
    #1
    TX123
    Closed Accounts Posts: 183 ✭✭


    Hi im studying physics in college and we are doing the wave and its properties. I am so confused on how to adapt the wave equation to sovinh problems (Asin(kx-wt) For example how can you find amplitude from that if it equals y(x,t) and if i differentiate it it u get v(x,t) = wcos(kx-wt) and using value for x and t = 0 u end up with an answer of zero. So can anyone help me understand this or are there any good books out there that halp understanding physics alot easier ?


Comments

  • #2
    dudara
    Registered Users, Registered Users 2 Posts: 33,518 ✭✭✭✭dudara


    The amplitude is the maximum disturbance from the centre of motion.

    Take the function y(x,t) = ASin(kx-wt).

    The maximum value any Sin function can have is 1. (Sin never exceeds 1). Therefore the maximum value for y(x,t) = A*1 = A or the amplitude.

    Wave equations are a little hard to understand initally. I'd maybe recommend Jones & Childers as a starter book for undergrad physics.


  • #3
    TX123
    Closed Accounts Posts: 183 ✭✭TX123


    thanks but still confused. ill have to get that book


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