When the driver applies the brakes of a light truck traveling at speed { v }_{ 1 } it skids a distance { d }_{ 1 } before stopping. How far will the truck skid if it is traveling at speed { v }_{ 2 } when the brakes are applied? Given: { v }_{ 1 } = 40 km/hr , { d }_{ 1 } = 3 m , { v }_{ 2 } = 80 km/hr