5. Pringle is running around the track. She comes to a stop in 2.5 s. During this time, her deceleration is 0.5 m/s?. How fast was Pringle running before she started to slow down?

Does the distance travelled by an oscillating mass between times t=0 and t2 equal the displacement of the particle over the same time period if t2> t/2? hint: consider a sine wave starting at t1=0, then consider a closing wave starting at t1=0, for your explanation.