Question

What do you mean by average velocity? An object starts moving along a straight line with an initial velocity
and under constant acceleration is final velocity becomes What is the average velocity of the given object?
Define the term which measures the rate of motion. Give its si unit
What term is used to denote the change of velocity with time? Obtain it Si unit​

Answer 1

Answer:

The average velocity of an object is its total displacement divided by the total time taken. In other words, it is the rate at which an object changes its position from one place to another. Average velocity is a vector quantity. The SI unit is meters per second. However, any distance unit per any time unit can be used when necessary, such as miles per hour (mph) or kilometer per hour (kmph).Calculating Average Velocity

Calculating this velocity is a simple task. We need to divide the total displacement by the total time elapsed:

v¯=ΔxΔt=xf−x0tf−t0,

How to calculate average velocity?

Where, ΔV is the average velocity,

Δx is the displacement,

Δt is the total time,

xf and x0 are the initial position and the final position,

tf and t0 are the starting time and the ending time.

If we take the starting time to be zero, the formula becomes:

v¯=Δxt

Explanation:

Difference between Average Speed and Average Velocity:

Average speed is defined as the total distance travelled by the time taken whereas average velocity is defined as the displacement by the time taken.

Since speed is a scalar quantity, the average speed is also considered as a scalar quantity while velocity is a vector quantity. Therefore, the average velocity is a vector quantity.

It is enough to say that the speed of an object says, 25 m/s but on the other hand, the expression for the velocity of the same object will be 25 m/s, east (or any other direction).