Change in Velocity: avg & difference in initial & final velocities

[BuhRock]

1. If the velocity at the beginning of an interval is 4 m/s and at the end of the interval it is 10 m/s, then what is the average of these velocities, and what is the change in velocity?


Give an example of positive initial and final velocities for which the order of the four quantities would be different.

For positive initial and final velocities, is it possible for the change in velocity to exceed the other three quanities?




2. avg velocity = displacement/time



3. It asks for the average of these velocities. So I can take 10m/s + 4m/s and divide by 2 which equals 7m/s to get the average of those two. The initial is is 4m/s and the final is 10m/s.

I'm not sure how to get the change in velocity with these.

 

[cepheid]

I'm not sure how to get the change in velocity with these. [/b]

The change in velocity is just...how much it changed. In other words, what was the difference between the final value and the initial value?

 

[BuhRock]

So 6 m/s. Is that all? I was over thinking it.

 

[cepheid]

So 6 m/s. Is that all? I was over thinking it.

Yeah: how much did the velocity change by? 6 m/s.

 

[rwisz]

I'm sorry I can't provide more information, but I have not been shown how to do this yet.

4. Yes, it is possible for the change in velocity to exceed the other three quantities in certain situations. For example, if the initial velocity is 5 m/s and the final velocity is 20 m/s, the change in velocity would be 15 m/s, which would be greater than both the initial and final velocities. This can occur if there is a significant acceleration or deceleration during the interval.