Question
What is speed? State its units and types. Explain instantaneous speed and average speed.
✓
Answer
The speed of a body is the distance travelled in unit time. The units of speed in CGS system is cm/s and in SI system is m/s.
There are two types of speed :
There are two types of speed :
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- Uniform speed : When a body covers equal distance in equal intervals of time throughout its motion, it is said to have uniform speed.
- Non-uniform or variable speed: When a body covers unequal distance in equal intervals of time it is said to have non-uniform speed.
The speed of the body at any instant is called instantaneous speed. Average speed is the ratio of total distance covered to total time taken.
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