Here is an example of a conversation between two friends using the abbreviation SM. Here is an example of a conversation between two friends using “sm”.What Does Sm Mean In Text, Tiktok and Social Platforms.As with speed, we might specify either the average velocity over a period of time, or the instantaneous velocity at an exact moment in time.Īlso see meter per second squared and Standard International ( SI ) System of Units. Or we might say the car is traveling at 20 m/s at a compass bearing of 25 degrees (north-by-northeast) this tells us its velocity. We might say a car is traveling at 20 m/s, and this tells us its speed. Speed is a Scalar (dimensionless) quantity, while velocity is a vector quantity consisting of speed and direction. It is important to realize that speed is not the same thing as velocity. This is a theoretical value, because it cannot be obtained except by inference from measurements made over progressively shorter time spans. The instantaneous speed, s inst, is the limit of the measured average speed as x approaches zero. Where the added and subtracted numbers represent seconds. The average speed can be measured over increasingly short time intervals centered at p, for example: Suppose an object is in motion at about that time. Let p represent a specific point in time. Instantaneous linear speed is more difficult to intuit, because it involves an expression of motion over an "infinitely short" interval of time. If s avg represents the average speed of an object (in meters per second) during a time interval t (in seconds), and the distance traveled in that time is equal to d (in meters), then: s avg = This quantity can be defined in either of two senses: average or instantaneous.Īverage linear speed is obtained by measuring the distance in meter s that an object travels in a certain number of second s, and then dividing the distance by the time. The meter per second (symbolized m/s or m/sec) is the Standard International ( SI ) unit of linear speed.
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