You’re traveling at 3 m/s North on your bike when you realize you are going to be late to school. You pump into high gear and accelerate at 2 m/s^2. What is your instantaneous velocity after 15s

v = v0 + at

v(15) = 3 + 2*15 = 33 m/s

That's some pedaling! 73.8 mi/hr