How do you find average value of normal acceleration?

[gikiian]

Homework Statement

Find average value of Normal Acceleration from the information given. (See the picture)

Homework Equations

$a^{→}_{ave}= Δv^{→}/Δt$

$a_{t}$=Δv/Δt

The Attempt at a Solution

I took the difference of the given angles in radians and divided it twice by Δt and get 3.6 rad/$s^{2}$ but the answer was wrong as expected. Please help.

 

[tiny-tim]

hi gikiian!

no, rad/s² is angular acceleration, isn't it?

you need the normal component of the ordinary (linear) acceleration

 

[gikiian]

Hey tiny-tim!

I have successfully obtained the linear acceleration vector. Would you now like to tell me with respect to what entity should I compute the normal component of it?

 

[gikiian]

Hey tiny-tim!

I have successfully obtained the linear acceleration vector. Would you now like to tell me with respect to what entity should I compute the normal component of it?

 

[tiny-tim]

my inclination would be to use the direction halfway between the two velocities

 

[gikiian]

You can'y do that.