This can be found directly off the equation itself. This equation follows the  y=Asin(ωt) format, so we can read that the amplitude is

 

 

 

 

Remember that ω=2π/T

                      so: 10 = 2π/T

                               T = 10/2π

 

 

 

c. Maximum Speed 

 

The amplitude of the v(t) function determines the maximum speed.

v(t) = -Aωcos(ωt)

 

so:

 

vmax = Aω

        = (2.00cm)(10rad/s)

        = 20.0 cm/s