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

Question

Yasmine Welch

Physics

14 March, 08:18

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)

Know the Answer?

Lawson Cohen · Answer 1

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

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 armsinward and finally spins at 8.8 π rad/s.What is her average angular accelerationduring this time interval?Answer in units of rad/s^2

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