[填空题]
The graphs of displacement,a ) gz +by:zg+)wf jo)8wsplp4 velocity and acceleration of a ro0tkhmqy ew)(smgp/. :ller coaster in a theme park are shown in tms(y0gh. w:q) tpme/khe following diagram.
1. Complete the following table by noting which graph A, B or C corresponds to each function.
When function is displacesment ;the graph is
When function is acceleration ;the graph is .
2. Write down the value of t when the velocity is greatest.
t= .