Question

Claire starts driving with an initial velocity of 5.0 m/s towards north. She drives along a straight, level path with a uniform acceleration and travels 500. m in 20. seconds . A. What is the average velocity for the entire 20. seconds ? B. What is the velocity at the end of 20. seconds ?

Answer 1

x = v0 * t + (1/2)at^2

plug in the initial velocity (5.0), t (20 seconds), and distance (x = 500)

solve for a to get the uniform acceleration

from there, you can determine the final velocity with vf = vi + at (this solves part B)

for part A) average velocity = (final velocity - initial velocity) / time