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**Physics question, solved but need clarification!!**

## Homework Statement

A bird take 8.5 s to fly from position A to position B. Determine the bird's avg acceleration

Vb = 7.8 m/s [25 degrees N of E]

Va = 4.4 m/s [ 31 degrees S of E]

## Homework Equations

Vax/Va = cos31

Vax/4.4 m/s = cos31

3.8 m/s

Vay/Va = sin31

Vay/4.4 m/s = sin31

2.3 m/s

Vbx/Vb = cos25

Vbx = 7.8cos25

7.1m/s

Vby/Vb = sin25

Vby= 7.8sin25

3.3m/s

Ay = Vby- Vay / t

3.3-2.3/ 8.5 s

0.12 m/s^2

Ax = Vbx- Vax / t

7.1 m/s - 3.8 m/s / 8.5 s

0.4 m/s^2

a^2 = Ax^2 + Ay^2

0.16 + 0.0144

0.174 m/s^2 and then you square root it 0.41 m/s^2

tantheta = Ay/Ax

0.12 m/s^2/0.4 m/s^2

0.3 = 17 degrees

## The Attempt at a Solution

The bird's avg acceleration is 0.41 m/s^2 [17 degrees N of E]

I just need to make sure if I did this right, if anyone would clarify this that would be great!!

thanks