a) uniform motion: object travels at constant speed
b) accelerated motion: object exhibits constant rate of acceleration
c) neiter a) or b) - the rate of acceleration varies.
There are basically six types of motion. These are as follows:
1) Simple harmonic motion.
2) Linear motion.
3) Reciprocation.
4) Brownian Motion.
5) Circular motion.
6) Rotary motion.