Why does an empty truck sometimes take longer to stop than a fully loaded one?

Giải thích

An empty vehicle has less weight pressing the tires to the road, so the tires have less traction and the wheels can lock up more easily during hard braking. Locked wheels skid and lengthen the stop, so an empty truck can actually require a longer distance to stop under some conditions. Brake smoothly and avoid locking the wheels regardless of load.