Answer:
Pencil lead.
Explanation:
no need for an explemation you can put two and two together XD
use the equations provided it shouldn't he hard
Explanation: It is because when a car is moving both the car and the driver is in inertia of motion. When a car is involved in collision it comes to a sudden stop and the car comes into inertia of rest whereas the person still in inertia of motion moves forward and might result in major injuries. But this can be prevented by wearing a seatbelt
Hope it helps :)
