Which question characterizes relative motion problems that involve motor boats? a. If the width of the river is X meters wide, then how much time does it take the boat to travel shore to shore? c. Both a and b. b. What distance downstream does the boat reach the opposite shore? d. None of the above.

that the correct one is C

Explanation:

In relative motion problems, in this case the boat and the river, with respect to the land and between them, the most common questions are:

* What is the time to cross the river

* How far down does the boat go

* What direction the boat must have to reach the opposite shore

examining the answers we see that the correct one is C

i'm just gonna leave this comment here, so i can get a challange done-

explanation:

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.