- #1
vande060
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Homework Statement
The displacement of a mass m = 0.01 kg is x(t) = 0.25m sin(62.83t/s − 0.785398) Find its amplitude, its total
energy, and its speed at t = 0.
Homework Equations
E = Av^2 + Bx^2
x = Asin(wt-theta)
The Attempt at a Solution
i use that above formula to find that Amplitude = .25
speed at t = 0 should be the derivative of the x function i think
v(t) = (.25m)(62.83)cos(62.83t/s - 0.785398)
v(0) = (.25m)(62.83)cos(- 0.785398)
I am not sure about the last part there with finding the energy, any suggestions?