Atruck covers 41 m in 7.1 s while smoothly slowing down to a final speed of 3.2 m/s. find its original speed. answer in units of m/s.

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.