what is speed?????expalin
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the speed of a body is the rate of change of distance with time .
numerically it is the distance travelled by the body in one second .
it is a scalar quantity
SI unit :
m/ sec
uniform speed
a body is said to be moving with uniform speed if it covers equal distances in equal intervals of time throughout its motion .
variable speed
a body is said to be moving with non uniform or variable speed if it covers unequal distances in equal intervals of time .
instantaneous speed
when speed of a body keeps on changing
its speed at any instant is measured by finding the ratio of the distance travelled in a very short interval to the time interval .
the speedometer of a vehicle measures instantaneous speed.
average speed is the ratio of the total distance travelled by the body to the total time of journey
hope it helps
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numerically it is the distance travelled by the body in one second .
it is a scalar quantity
SI unit :
m/ sec
uniform speed
a body is said to be moving with uniform speed if it covers equal distances in equal intervals of time throughout its motion .
variable speed
a body is said to be moving with non uniform or variable speed if it covers unequal distances in equal intervals of time .
instantaneous speed
when speed of a body keeps on changing
its speed at any instant is measured by finding the ratio of the distance travelled in a very short interval to the time interval .
the speedometer of a vehicle measures instantaneous speed.
average speed is the ratio of the total distance travelled by the body to the total time of journey
hope it helps
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Answered by
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Answer:
Speed is the ratio of distance covered to the time taken. It is scalar quantity.
It's SI unit is metre.
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