Question

Dwfine speed .what is the SI unit of speed? Who is meant by average speed and uniform speed?

Answer 1

speed is :the rate at which someone or something moves or operates or is able to move or operate.

the SI unit of speed is second
Units of speed include: metres per second (symbol m s−1 or m/s), the SI derived unit; kilometres per hour (symbol km/h); miles per hour (symbol mi/h or mph);

AVERAGE SPEED : Average speed is a rate. In kinematics, a rate is always a quantity divided by the time taken to get that quantity (the elapsed time). Since average speed is the rate position changes, average speed = distance traveled/time taken.

UNIFORM SPEED : If a body covers equal distance in equal intervals of time then it is said to be moving at uniform speed. Mathematically speed is defined as v = S⁄t here v is speed of object, S is the distance covered and t is time taken.

Answer 2

speed is a distance covered by an object in one unit of time.
SI unit of speed is m/s and another unit is km/h
.
an average speed is a ratio of total distance covered by an object in taken time.
an object covers equal distance in equal interval of time is called uniform speed.