The purpose of the interrupt is to cause the computer or processor to work on a different task temporarily and after finishing that work return to its previous work.
The difference between interrupts and traps is that the interrupts are hardware generated interrupts while the traps are software generated interrupts.
Yes, user programs can generate traps intentionally. So that it can be used to call operating system routines or it can arithmetic errors.
Inertia would keep them going the same speed as the car was going. therefore, the person not wearing a seatbelt would be sent flying forward, probably ending up dead
