*
*

To do this we must first write an equation for the oscillation and then find the times at which the object is found at
the two points.

What values do we have?

T = 4.0s

A = 10cm

We know that ω=2π/T, so substituting this into the equation for an oscillator:

y = Asin(2πt/T)

Now we can find at what times the oscillator is at the given points.

y = Asin(2πt/T)

0 = (10cm)sin(2π t /4)

sin(t*π/2)=0

t*π/2 = π

t = 0s

y = Asin(2πt/T)

6.0cm = (10cm)sin(2π t /4)

sin(t*π/2)=0.6

t*π/2 = sin-1(0.6)

t = 2sin-1(0.6) / π

= 0.410s

t = 0.410s - 0.0s

= 0.410s