A runner has an initial velocity of 4 meters per second after 20seconds the runners velocity is 6 meter per second what is the runner acceleration?

The runner's acceleration can be calculated using the formula: ( acceleration = \frac{change\ in\ velocity}{time} = \frac{6 m/s - 4 m/s}{20 s} = 0.1 , m/s^2 ). So, the runner's acceleration is ( 0.1 , m/s^2 ).