Final answer:
When following another vehicle on a gravel road, it's safest to increase your following distance. This helps prevent vehicle damage and improves reaction time. In addition, the experiment scenario proposes analyzing car damage on different road surfaces to test a hypothesis.
Step-by-step explanation:
If you are following another vehicle on a gravel road, you should increase your following distance to get farther away from that vehicle. This is important for safety reasons; on gravel roads, vehicles can kick up rocks, dust, and debris which may impair your visibility and potentially damage your vehicle. By increasing your distance, you reduce the risk of rock chips on your windshield or paint, and you also allow yourself more time to react if the vehicle in front of you suddenly stops or encounters an obstacle.
In a related scenario that tests the hypothesis of vehicle damage on different road surfaces, you might design an experiment where you compare the impact on a car's condition after driving on both gravel and dirt roads. This could involve visually inspecting the vehicle for damage, measuring any dents or paint chips, and evaluating tire wear after traveling on each type of surface.
On the topic of physics and the perception of sound, the GRASP CHECK highlights a principle called the Doppler effect. When considering the scenario of an ambulance passing by with its siren on, the frequency observed will most closely match the actual frequency of the siren when the ambulance is passing right in front of you, because there is no relative motion between the observer and the source of the sound at that instant.