A boat floats south on the Amazon River at a speed of 6 m/s. The boat and passengers have a combined mass of 540 kg.

a. What is the momentum of the boat? (Remember, momentum is a vector quantity.) (3 points)

b. The passengers paddle backward, reducing the speed to 4 m/s. What was the impulse applied to the boat by the paddling? (3 points)

Question

A boat floats south on the Amazon River at a speed of 6 m/s. The boat and passengers have a combined mass of 540 kg. 
 
a. What is the momentum of the boat? (Remember, momentum is a vector quantity.) (3 points)

b. The passengers paddle backward, reducing the speed to 4 m/s. What was the impulse applied to the boat by the paddling? (3 points)

BrunotheRAT · Answer

Is t just A and B or is there A B C D

Mercury · Answer

This is not a multiple choice question.  A and B are asking for two separate calculations.

part A) momentum = mass * velocity
since they give the speed and direction separately, calculate mass * speed. to make this a velocity, mention that the direction is south

part B) impulse = change in momentum
the mass of the boat + passengers is constant, so simply calculate (mass)(final velocity - initial velocity)