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Homework Statement
We have an object whose mass is 0.7 kg moves with an equation y=0.45cos8.4t.
Find the general energy
w=8.4 A=0.45
Homework Equations
E=mv^2/2 +kA^2/2
The Attempt at a Solution
So I found k using w=(k/m)^0.5. And then I found V0 using V0=A*(k/m)^0.5
and then i found x using F=kx
Then I found V=V0*(1-x^2/A^2)^0.5
And then I used E=kA^2/2+mv^2/2
IS THIS RIGHT?