Physics

Addison Bray

29 July, 02:22

A. Question: Jessica stretches her arms out. 6 m from the center of her body while holding a 2 kg mass in each hand. She then spins around on an ice rink at 1.1 m/s. What is the combined angular momentum of the masses?

Work: For this question, I got L = 2.64 kg*m^2/s. Is this right?

B. Question: If she pulls her arms in to 0.15 m, what is her linear speed if the angular momentum remains constant?

Work: This is the equation I used, L / (m) (r^2)

Which would make L = 2.64 from previous question. r =.15 m. m = 2 kg. v2 = unknown

Substitution:

v2 = 2.64 / (.15) (2) (2) Is this step right?

What is the linear speed? (I tried to show all my work, so, you know where I got stuck.)