Uniform acceleration | Variable acceleration |
In uniform or constant acceleration, the velocity of an object changes by an equal amount in every equal time period. | If changes in velocity are not equal in the equal intervals of time, the acceleration is said to be variable. |
Acceleration does not change with respect to time | Acceleration is different for different time intervals |
Eg: Body under freefall of gravity (assuming all other opposing forces to be zero). | Eg: Motion of a bike on a crowded road. |