Question

Use the appropriate arc length formula to find the missing information. s=? r=1cm θ= 70radians

Answer 1

Do you know how to find the circumference of a circle?

Answer 2

\[s=r \theta \implies s=.01m*70rad=.7m\]

Answer 3

As radians aren't a "unit"

Answer 4

^ it's a 'dimensionless' unit.

Answer 5

That's more precise :)

Answer 6

Good notice of the units, though. That is important!

Answer 7

I'm a physics major, dimensional analysis is my friend haha