canoes and kayaks of any length must have a properly fitting PFD (personal flotation device.) (Type I, II, III or V in flotation rating) for each person on board.
Answer from: Quest
explanation:
the masses of the objects and the distance between them
While you are driving in the lane next to the curb on a multi-lane road the car on your left suddenly moves toward you lane. they are about toy crash into your front fender. you