A truck of mass 1800 kg is travelling along a straight horizontal road when the driver suddenly spots an obstacle ahead. The driver has a reaction time of 0.6 s, after which a constant braking force of 7200 N is applied until the truck stops.
The velocity-time graph below represents the motion of the truck from the moment the driver first spots the obstacle (t=0 st = 0\text{ s}t=0 s).
What is the total stopping distance of the truck?
72.0 m72.0\text{ m}72.0 m
86.4 m86.4\text{ m}86.4 m
100.8 m100.8\text{ m}100.8 m
158.4 m158.4\text{ m}158.4 m