AP Ferryman Lab

There is a fair amount of confusion about this lab so let me try to sort it out here.

We did most of the activities in class. First we had o river current. The boat crossed the river going 100.8 m in 5.04 s indicating that its velocity with respect to the water [ v b,w] was 20 m/s and in this case due north. The with the boat point straight north , i.e. heading = 0 deg, we set the current to 10 m/s. The simulation gave the x displacement as 50.4 m and the y as 100.8. The time again was 5.04 seconds. From this we calculated the total distance traveled and the speed wiht respect to the shore by dividing this distance by the time. We then calculated the velocity using velocity components of vx = 10 m/s and vy = 20 m/s.

We the tried to steer the boat so it would go straight across the river. This required that the component of vb,w in the x direction be -10 m/s . Since we knew vb,w had a magnitude of 20 m/s we could find the direction. Since the simulation reads direction as angle from north ( i.e. theta y) we could find theta x using inv cos (x component/20)and then its complement which would be theta y.

You should be able to include all this in your report and then do the additional work called for. This is all due Monday and is informal.

A purpose and conclusion are required. Did we prove or demonstrate anything ( components, relative velocity, etc.?)