Tangential/Normal Components etc.

[salman213]

1. A path is defined by the function y=1/20 x^2. One instant x=10m and y= 5 m the speed is 6 m/s and increasing at 2 m/s^2.

a)Find the directional angle of the velocity from the horizontal?
The answer is 45 degrees

b)What is the radius of curvature of her path at this instant?
The answer is 28.28 m



3. Can anyone give any hints onto how I should start this problem I am really confused!

 

[salman213]

any ideas?

 

[Pyrrhus]

It's a standard dynamics problem. Why don't you go ahead and check your textbook and then post your attempt.