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Physics question, solved but need clarification!
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]
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 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
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