2.5. Uniform Acceleration http://www.ck12.org
Summary
- Acceleration that does not change in time is uniform, or constant, acceleration.
- The equation relating initial velocity, final velocity, time, and acceleration isvf=vi+at.
Practice
Questions
Based on the knowledge you already have, fill in these three graphs, assuming an object begins atx= -10m,vi=
0m/s, anda= 0.5m/s^2. Let the top graph show position in meters (blue arrow), the middle graph show velocity in
meters per second (red arrow), and the bottom graph show acceleration in meters per second squared (green arrow).
The labels across the bottom (0 to 20) are time, in seconds.
Download this activity, and use it to answer the questions below about the relationships between position, velocity,
and acceleration.
http://phet.colorado.edu/en/simulation/moving-man
- Familiarize yourself with the program. Then, set the initial position to -10m, the velocity to 0 m/s, and the
acceleration to 0.5 m/s^2. Run the program, and look at the graphs the program produces. How do they compare
to the graphs you predicted? For each graph, explain why it looks as it does. - Given the velocity and acceleration graphs given here, draw the man’s position graph. Assume he starts at 0
m. - Given the position and velocity graphs given here, draw the acceleration graph. Assume the man starts at 0
m/s^2.