Jessica stretches her arms out to 0.6m from the center of her body while holding a 2 kg mass in each hand She then spins around
on an ice rink at 1.1m/s.
If she pulls her arms in to .15 m, what is her linear speed if the angular momentum remains constant?
1 answer:
Answer:
4.4 m/s
Explanation:
Angular momentum is:
L = Iω
For a point mass, this can also be written as:
L = mvr
Angular momentum is conserved, so:
L₁ = L₂
m₁ v₁ r₁ = m₂ v₂ r₂
(2 kg) (1.1 m/s) (0.6 m) = (2 kg) v (0.15 m)
v = 4.4 m/s
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