Asked by Charlie

The position of a 20 g oscillating mass is given by x(t) = (2.0 cm) cos(2t), where t is in seconds. Determine the following.

The Amplitude (cm.)
The Period (s.)
The Spring Constant (N/m)
The maximum speed (cm/s)
The total energy (J)
The velocity at t=0.40 s. (cm/s)

I need your help, please help me guys. Thanks!
Answered by bobpursley
Well, all this is level one definition work. What is it you don't understand?
Answered by Charlie
i figured out the amplitude and the period, i just don't kno how to get to the other 4 with using simple harmonic motion equations
Answered by bobpursley
spring constant:

Period=2PI sqrt (m/k)

max speed= 2*2

energy= 1/2 k x^2

velocity= 2*2 sin2t
Answered by Charlie
can u give me these in numbers please, i don't understand what formulas u wrote and what some of the stuff in ur formulas are
Answered by bobpursley
Then you are in great trouble in Physics B. You need to review periodic motion in your text.
Answered by Anna
how do yo find the spring constant?
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