A runner covers the last straight stretch of a race in 4 s. During that
time, he speeds up from 5 m/s to 9 m/s.
What is the runner’s acceleration in this part of the race?

Step 1: Identify the knowns - Initial velocity (v₀): 5 m/s - Final velocity (v): 9 m/s - Time (t): 4 s Step 2: Choose the appropriate equation We can use the following equation of motion to find the acceleration: v = v₀ + at Where: - v is the final velocity - v₀ is the initial velocity - a is the acceleration - t is the time Step 3: Solve for acceleration (a) Rearrange the equation to solve for 'a': a = (v - v₀) / t Substitute the known values: a = (9 m/s - 5 m/s) / 4 s a = 4 m/s / 4 s a = 1 m/s²

Answered by kathleenquiray12 | 2025-03-20