How to Calculate Velocity Change: Car Goes 13.9 m/s East to 12.8 m/s Northeast

[Fusilli_Jerry89]

a bird flies 10 m/s east for 2 seconds, then 10 m/s north for 1 second,whats the avg. velocity?
Is all you do add the vectors? The x component would be 20 and y be 10? and get around 22?


A car's velocity changes from 13.9 m/s east to 12.8 m/s northeast. What is the change in it's velocity?

 

[PhanthomJay]

a bird flies 10 m/s east for 2 seconds, then 10 m/s north for 1 second,whats the avg. velocity?
Is all you do add the vectors? The x component would be 20 and y be 10? and get around 22? Always show your units. Average velocity is displacement divided by time. You have correctly calculated the magnitude of the displacement to be about 22 meters. So what's the magnitude of the average velocity? And since velocity must have a direction associated with it, what is the direction of the average velocity?? [/color]


A car's velocity changes from 13.9 m/s east to 12.8 m/s northeast. What is the change in it's velocity?

Try to work on the first problem before tackling the second one.

 

[OlderDan]

a bird flies 10 m/s east for 2 seconds, then 10 m/s north for 1 second,whats the avg. velocity?
Is all you do add the vectors? The x component would be 20 and y be 10? and get around 22?


A car's velocity changes from 13.9 m/s east to 12.8 m/s northeast. What is the change in it's velocity?

The average velocity is the total displacement divided by the total time.

The change in velocity is the vector difference between final velocity and initial velocity

 

[Fusilli_Jerry89]

so wuld the first one be 20/3 which is 7.33 m/s at 26.6 degrees?

 

[PhanthomJay]

so wuld the first one be 20/3 which is 7.33 m/s at 26.6 degrees?

You mean of course 22/3. Your answer is just about correct. you should add, also, 26.6 degrees north of east.