# physics

posted by
**maria** on
.

A runner, beginning at rest, completed a 50 m run with a final speed of 6 m/s. Assuming constant acceleration.

a) What was the average speed of the runner?

b) What was the runner's time?

c) What was the acceleration?

a) half the final speed

b) distance/(average speed)

c) (final speed)/(elapsed tme)

= (final speed/([distance/average speed)]

=(final speed)^2/[2*(distance)]