## 2 thoughts on “2.16”

1. ckeranen says:

Hi Paul. I noticed that a_t is negative when you punch in 32.174 * sin (-26. 565) but you have it listed as a positive number. Is this because 32.174 is supposed to be negative or do we just always assume a_t to be positive? Thanks

1. tutorpaul says:

Yeah, I forgot to mark $g$ as being downward and thus negative with respect to our upward pointing $Y$ direction.