7. In a 5.00km race, one runner runs at a steady 12.0km/h and another runs at 14.5km/h. how long does the faster runner have to wait at the finish line to see the slower runner cross? 8. A car starts from x; = 10m at t=0s and moves with the velocity graph shown in Figure below. What is the object's position at t=2s, 3s and 4s? and fa by v (m/s) 12 8 4 0. -4 1 2 3 4 -t (s)