Suzie (of mass 84 kg) is roller-blading down the sidewalk going 34 miles per hour. She notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop in 1.1 seconds.

Question

Suzie (of mass 84 kg) is roller-blading down the sidewalk going 34 miles per hour. She notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop in 1.1 seconds.
What is Suzie’s average acceleration? Answer in units of m/s2.

Damon · Answer

a = change in velocity/ change in time 34 mi/h = 15.2 m/s (use Google) change in v/time = -15.2/1.1 m/s^2