SPEED_AND_VELOCITY

[00:06.42] Spend a moment and just take a look all around you

[00:15.91] People, dogs, and plants, everything it constantly

[00:19.92] moves

[00:20.91] Even still objects, like buildings or lamp in your room

[00:23.67] They're still in motion because our planet is always

[00:27.17] moving

[00:28.68] Speed is the distance an object moves in time

[00:30.18] Like the speedometer when your car drives

[00:32.18] Meters per second is the SI

[00:38.66] The standard for the measurement

[00:40.66] Equation, average speed equals distance over time

[00:43.92] It's scalar, magnitude, no measure of direction

[00:45.91] Instantaneous speed is the speed of an object at a

[00:50.42] specific

[00:51.67] Moment in time, but it may speed up or slow,

[00:52.67] measured in meters per second

[00:55.20] Speed is only scalar, it doesn't tell us which way we

[00:56.67] drive

[00:58.43] Calculated by measure distance divided by time

[01:00.92] Like if you drove to your grandma's house just to say

[01:02.92] hi

[01:05.16] You'd take the meters, divide it by the full time to

[01:07.42] drive

[01:08.69] Speed equals distance over time

[01:09.92] Speed equals distance over time

[01:11.42] Speed equals distance over time

[01:13.42] Speed equals distance over time

[01:22.94] Now velocity is how fast moving with direction

[01:25.92] A numerical value, vector with two measurements

[01:27.67] Like you're driving 10 meters per second going west

[01:32.42] The direction and distance is called the

[01:34.42] displacement

[01:35.92] Say if you were walking to class

[01:38.92] Your exact distance follows your path

[01:42.68] But displacement is the shortest distance

[01:45.92] From the starting to the ending

[01:48.42] Equation, equals displacement over the time

[01:52.68] Instantaneous velocity split second in time

[01:55.66] Acceleration is a measure of how fast the

[01:57.91] velocity of an object changes

[02:00.42] It's also a vector using size and direction

[02:03.67] Let's say you walk to the store it takes you 30

[02:05.67] seconds

[02:07.42] Walking west 100 meters, it is the full distance

[02:09.92] But the displacement it only shows 50 meters so it's

[02:13.42] Your velocity is 1.7 meters per second west

[02:16.92] Velocity equals displacement over time

[02:20.20] Velocity equals displacement over time

[02:22.20] Velocity equals displacement over time

[02:25.67] Velocity equals displacement over time