Copyright © Michael Richmond.
This work is licensed under a Creative Commons License.
Equations of 1-D Kinematics
- Describing motion in one dimension is very easy if a
body has constant velocity.
(x - xo) = v * (t - to)
- It's still not too bad if a body has constant acceleration.
One can derive a set of four equations which connect time and
the body's position, velocity, and acceleration.
(v - vo) = a * (t - to)
(x - xo) = (avg v) * (t - to)
1 2
(x - xo) = vo * (t - to) + --- * a * (t - to)
2
2 2
2 * a * (x - xo) = v - vo
- The key to solving problems in kinematics is
to understand what's going on.
Only if you comprehend the situation will you be able
to pick the equation(s) which take the information
given and yield the desired result.
- Sometimes, the four kinematic equations for constant
acceleration are written under the assumption that
to = 0 and xo = 0; they then take the
form
v = a * t
x = (avg v) * t
1 2
x = vo * t + --- * a * t
2
2 2
2 * a * x = v - vo
Viewgraphs
Copyright © Michael Richmond.
This work is licensed under a Creative Commons License.