<human>: Objective: how to brush your hair?

Which of the following solutions is more sound in terms of naive physics reasoning?

OPTIONS:
- take a hairbrush and drag through hair starting at the bottom and slowly working through the tangles
- take a hairbrush and drag through hair starting at the top and quickly working through the tangles
<bot>: take a hairbrush and drag through hair starting at the bottom and slowly working through the tangles