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13 October, 20:53

A figure skater begins spinning counterclockwise at an angular speed of 3.2 π rad/s. During a 4.2 s interval, she slowly pulls her arms

inward and finally spins at 8.8 π rad/s.

What is her average angular acceleration

during this time interval?

Answer in units of rad/s^2

+1
Answers (1)
  1. 13 October, 23:51
    0
    4.2 rad/s²

    Explanation:

    Given:

    ω₀ = 3.2π rad/s

    ω = 8.8π rad/s

    t = 4.2 s

    Find: α

    ω = αt + ω₀

    8.8π rad/s = α (4.2 s) + 3.2π rad/s

    α = 4.2 rad/s²
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