Explain about speed and velocities ?
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SPEED
●Speed of a body is the distance travelled by it for unit time .
● The speed of an object can be calculated by dividing the distance travelled by the time taken to travel distance.
● Speed is a scalar quantity.
VELOCITY
● velocity of a body is the distance travelled by it per unit time in a given direction.
● Thee SI unit of velocity is same as that of speed namely metres per second .
● velocity is a vector quantity .
speed, being a scalar quantity, is the rate at which an object covers distance .The average speed is the distance ( a scalar quantity ) per time ratio … on the other hand , velocity is a vector quantity ; it is direction -aware . velocity is the rate at which the position changes
Speed is a scalar quantity that has magnitude but no fixed direction. Velocity is a vector quantity that has both magnitude and direction. Speed is always positive . Velocity can be negative, positive, or O.