- #1
salman213
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In simple harmonic motion example there is a question
velocity max is given
velocity at time = 0 is given (which is not equal to maximum velocity --> not at equilibrium point at time=0)
graph is also given of the velocity function
IT asks to find the phase angle
in the solution they use the formula
v(t)=-vmaxsin([tex]\omega[/tex]t + [tex]\varphi[/tex])
using vmax and v(0) they solve for [tex]\varphi[/tex]
then they add 2pie to it and say the answer is either x rad or 2pie + xrad (where x is the answer they found)
why do they add this 2pie (i know it has the same value but it can then be k2pie where k is any integer since x rad + 2pie or x rad + 4 pie or x rad + 6pie etc. will also give u the same answer)
any help?
velocity max is given
velocity at time = 0 is given (which is not equal to maximum velocity --> not at equilibrium point at time=0)
graph is also given of the velocity function
IT asks to find the phase angle
in the solution they use the formula
v(t)=-vmaxsin([tex]\omega[/tex]t + [tex]\varphi[/tex])
using vmax and v(0) they solve for [tex]\varphi[/tex]
then they add 2pie to it and say the answer is either x rad or 2pie + xrad (where x is the answer they found)
why do they add this 2pie (i know it has the same value but it can then be k2pie where k is any integer since x rad + 2pie or x rad + 4 pie or x rad + 6pie etc. will also give u the same answer)
any help?
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