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Distinguish between speed and velocity.
| Sl no | SPEED | VELOCITY |
| 1 | Defined as the rate of change of distance | Defined as the rate of change of displacement |
| 2 | It's a scalar quantity | It's a vector quantity |
| 3 | It can never be negative or zero | It can be negative and zero |
| 4 | It is velocity without direction | Velocity is directed speed |
| 5 | It may or may not be equal to the velocity | The body may possess different velocities but same speed |
| 6 | Speed never decreases with time, for a moving body, it can never be zero. | Velocity can decreases with time, for a moving body, it can be zero |
| 7 | SI unit is ms-1 | SI unit is ms-1 |
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