Posted by Charlie on .
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!

AP Physics B 
bobpursley,
Well, all this is level one definition work. What is it you don't understand?

AP Physics B 
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

AP Physics B 
bobpursley,
spring constant:
Period=2PI sqrt (m/k)
max speed= 2*2
energy= 1/2 k x^2
velocity= 2*2 sin2t 
AP Physics B 
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

AP Physics B 
bobpursley,
Then you are in great trouble in Physics B. You need to review periodic motion in your text.

AP Physics B 
Anna,
how do yo find the spring constant?