Distinguish between speed and velocity.
NCERT Class IX
Sciences - Main Course Book
Chapter 8. Motionexample 8 .5.6.
7 .
Answers
Speed is the distance travelled by an object in a given interval of time. It does not have any direction. Velocity is the displacement of an object in a given interval of time. It has a unique direction.
Speed is given by the relation: Velocity is given by the relation:
The speed of an object can never be negative. At the most, it can become zero. This is because distance travelled can never be negative. The velocity of an object can be negative, positive, or equal to zero. This is because displacement can take any of these three values.
Answer:
speed is defined as distance upon time
it is a scalar quantity
its SI unit is metre per second
velocity is defined as displacement upon time
it is a vector quantity
its SI unit is metre per second
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