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meganw
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Homework Statement
A 2.00 kg mass vibrates according to the equation x = 0.470 cos 8.36t, where x is in meters, and t is in seconds. Assume that x = 0.29 m.
(a) Determine the amplitude.
.470
(b) Determine the frequency.
1.331
(c) Determine the total energy.
(d) Determine the kinetic energy.
e) Determine the potential energy.
I did the first two parts (a-b), but I'm stuck on c,d & e, the questions about the Energy of the spring.
Homework Equations
PE = .5kx^2
and
KE = .5KA^2
F/x=k
The Attempt at a Solution
I've tried these 3 multiple times and I keep getting them wrong. One thing I'm not sure of, is is "x" the amplitude? I have been plugging in .29 for the "x" and .47 for the "A", but just curious if this is the reason I'm getting these wrong.
I would think, that according to these formulas, KE+PE=TOTAL ENERGY, and I thought I was doing them right. I'm at my wits end.
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