A hawk flies in a horizontal arc of radius 13.0 m at a constant speed of 4.25 m/s.

(a) Find its centripetal acceleration.
I got 1.3894 m/s^2 which is right.

(b) It continues to fly along the same horizontal arc but increases its speed at the rate of 1.20 m/s2. Find the acceleration (magnitude and direction) under these conditions.

__________m/s^2 @ _______ degrees (towards the center of the circle)

we're doing harmonic motion and oscillations so i kinda forgot

Thanks! anything would help
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wat?
well acceleration is a vector. so just separate out all of your X and Y coordinations and calculate those individual accelerations then just add the vectors together.
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i'm doing the exact same crap in physics... i'm lost... need loads of help myself.
It's 42. Everyone knows hawks fly at 42.
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well, centripetal acceleration (alpha) is what you're trying to find I guess, and you're given linear acceleration (a).

Use the formula:

Actually, I think you may have to use:

(total acc)^2 = (linear acc)^2 + (cent. acc)^2
lol deffinetly mastering physics isnt it...

damn i gotta do mine soon.. stupid electric fields==integrals

stupid engineering..

 if tis a constant radius the tangential acc should be 90 degrees and the radial should be 0 degrees should it not? and hte total accelleration would be cos(radial accel) + sin (tangential accel) am i not correct?..
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Last edited by JimmyBanks6 at Feb 22, 2009,
Quote by tigerking615
Actually, I think you may have to use:

(total acc)^2 = (linear acc)^2 + (cent. acc)^2

hey that's right.
i don't know why i've never seen that before

my only problem how do you get the angle? is that also with vectors?
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edit my last edit

i think this edit is correct --> the angle should be theta=tan^-1[(tang accel) / (rad accel)]

i may be incorrect as i am not writing this down and trying to think at through in my head
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Last edited by JimmyBanks6 at Feb 22, 2009,
it's actually (rad accel/ tan accel) apparently.
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Quote by marktuazon
it's actually (rad accel/ tan accel) apparently.

hmm that does make sense.. i probly shoulda written it down and i wulda made my way to that conclusion.. sry if i messed up ur Mastering Physics... which i think it is your working on?
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Quote by jimmyled
jimmybanks youre a genius.

aparently i ar smrt?
Quote by dyingLeper
jimmybanks youre a genius

GO SENS GO