magnitude of average velocity and derive equation
I'm having difficulties on these questions, I have some ideas on how to solve but not sure if their right.
1. Consider a circular track with a radius of 200 meters, suppose it takes 2 minutes to run from her starting point to the opposite side of the track. What is the magnitude of her average velocity over this 2 minute interval? What is her average speed over the same interval?
I did 400m/120s and got 3.33 m/s, and for speed 400m/120s = 3.33 m/s (should I be putting significant figures also or?
2. Derive Vf^2=Vi^2+2ad (think this is equation for velocity of an object)
I thought that you would treat it like a derivative and comes out to 2Vi+2,
