if you accelerate from a stand-still at 2m/s/s for four meters and end at 8m/s your average velocity is 5m/s. but at one meter the instantaneous velocity is 2m/s, at two meters it is 4m/s, three is 6m/s and four meters is 8m/s.
0meters 1meter 2meters 3meters 4meters
|---------------|---------------|---------------|---------------|
0m/s 2m/s 4m/s 6m/s 8m/s
Speed is the magnitude of distance travelled per unit time, whereas velocity depends on the magnitude of distance travelled as well as the direction of motion. Speed is a scalar quantity, velocity is a vector. Speed cannot be negative, velocity can be negative. Average speed of an object after travelling a certain distance is always non-zero, but for velocity the average velocity can be zero (this follows from the previous idea).
The term "velocity", as used in physics, DOES have an associated direction. Most derived terms, such as "average velocity", also do.
The velocity is constant in a steady flow pipe while in the unsteady flow the velocity is not constant.
No. Average velocity is still a velocity.Distance is a product of (a velocity or speed) times (a length of time).
The instantaneous velocity is the limit of the average velocity, as the time interval tends to zero. If you are not familiar with limits, basically you make the time interval very small and calculate the average velocity.
V(t) = ds/dt
Average (when talking about the speed).
Speed is the magnitude of distance travelled per unit time, whereas velocity depends on the magnitude of distance travelled as well as the direction of motion. Speed is a scalar quantity, velocity is a vector. Speed cannot be negative, velocity can be negative. Average speed of an object after travelling a certain distance is always non-zero, but for velocity the average velocity can be zero (this follows from the previous idea).
For the instantaneous value of average velocity, average speed and average velocity are equal.
Velocity is speed and its direction. Average velocity is average speed and its direction.
Always.
Average velocity is def.ined as the ratio of total displacement to total time taken.
The term "velocity", as used in physics, DOES have an associated direction. Most derived terms, such as "average velocity", also do.
velocity is a vector and speed is scalar. Velocity has magnitude and directions, with magnitude being speed. The magnitude of average velocity and average speed is the same.
The velocity is constant in a steady flow pipe while in the unsteady flow the velocity is not constant.
The speed of something in a given direction.
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.