Imagine Two Boats $5.0 \mathrm{~m} / \mathrm{s}$ Eastward Relative to the Earth and the Other

Multiple Choice

Imagine two boats. One travels $5.0 \mathrm{~m} / \mathrm{s}$ eastward relative to the earth and the other $3.4 \mathrm{~m} / \mathrm{s}$ eastward relative to the earth. We set up a reference frame on each boat with the $x$ axis pointing eastward, and choose the first boat (arbitrarily) to be the Home Frame. The second boat is thus the Other Frame. What is the sign of $\beta$ , according to the convention established in this chapter?

A) Positive
B) Negative
C) We are free to choose either sign.