# 100-meter dash

## Homework Statement

A sprinter can accelerate with constant acceleration for 3.40 s before reaching top speed. He can run the 100-meter dash in 10 s.

What is his speed as he crosses the finish line? (in m/s)

## Homework Equations

kinematic equations

## The Attempt at a Solution

a (acceleration) is positive and nonzero for the first 3.40 s

a is zero for the last 6.60 s