Question

1.  (a)  Define average speed.

Answer 1

The average speed of an object is the total distance traveled by the object divided by the elapsed time to cover that distance. It's a scalar quantity which means it is defined only by magnitude. A related concept, average velocity, is a vector quantity.

Answer 2

Explanation:

Average speed:

The "total distance" traveled by a "body in a definite interval of time" is known as "average speed".

By derivation it is represented as,

Average speed = Total time taken / Total distance

Speed is a scalar quantity. So it does not have a unit. the "instantaneous speed" is the "limit of the average speed" as the "duration of the time interval" approaches zero."