Constant Speed
Constant speed.
Relative or apparent motion.
The distance an object travels in a certain period of time without regard to direction is known as the object's displacement. Displacement is a vector quantity, meaning it has both magnitude (length) and direction. It is calculated by subtracting the initial position of the object from its final position. For example, if an object starts at position (2, 4) and ends at position (6, 8), the displacement would be (4, 4). Displacement is a vector quantity It has both magnitude (length) and direction It is calculated by subtracting the initial position of the object from its final positionTo put it simply, displacement is the distance an object travels in a certain period of time without regard to direction.
There is average velocity, and there is instantaneous velocity. I don't think "overall velocity" is a concept generally used in physics; please clarify what you mean.
That's true throughout any period of time during which the acceleration is constant.
Constant speed.
orbit
the object's "speed".(not 'velocity')
Relative or apparent motion.
Either one of the following observations tells you that an object is accelerating: -- Three points in the object's path are not in a straight line. -- The distance the object travels in a period of time is not the same as the distance it travels in another period of the same duration.
Generally it is a Yes. Instantaneous velocity is the exact velocity at a particular time in the course of the movement. However, average velocity is the average of all the instantaneous velocity over a period of time. It is also known as speed in everyday life. As a result, the movement of an object over a time period under varying velocity denotes a varying instantaneous velocity which could be different from the average velocity. It is however, possible that the instantaneous velocity equates to the average velocity at a certain point over the duration of movement. For example, a ball is traveling at instantaneous velocity of 99m/s at t=1s , 100m/s at t=2s and 101m/s at t=3s. the average velocity over the 3s period is hence 100m/s which coincides with the instantaneous speed at t=2s.
The distance an object travels in a certain period of time without regard to direction is known as the object's displacement. Displacement is a vector quantity, meaning it has both magnitude (length) and direction. It is calculated by subtracting the initial position of the object from its final position. For example, if an object starts at position (2, 4) and ends at position (6, 8), the displacement would be (4, 4). Displacement is a vector quantity It has both magnitude (length) and direction It is calculated by subtracting the initial position of the object from its final positionTo put it simply, displacement is the distance an object travels in a certain period of time without regard to direction.
That's the definition of the object's average speedduring that period of time.Note: Not velocity. That's something different.
The average velocity over an time interval is the average of the instantaneous velocities for all instants over that period. Conversely, as the time interval is reduced, the average velocity comes closer and closer to the instantaneous velocity.
To be pedantic... In a car with a digital speedometer, speed is NOT instantaneous in the sense that it is a measure of distance per unit time. It does this by measuring a change in distance over a very short period of time to *approximate* the instantaneous speed. If the time period is a small fraction of a second you wouldn't know the difference! For older cars with analog speedometers the speed is instantaneous as it directly translates the speed at which your wheels are turning.
There is average velocity, and there is instantaneous velocity. I don't think "overall velocity" is a concept generally used in physics; please clarify what you mean.
Suppose you accelerate in your car from stopped to 50 km.hr-1. When you were stopped your instantaneous speed was zero. At the end of the period of acceleration your instantaneous speed was 50 km.hr-1. If your rate of acceleration was constant then your average speed was 25 km.hr-1.