Afigure skater begins spinning counterclock-
wise at an angular speed of 3.2 7 rad/s. dur-
ing a 4.6 s interval, she slowly pulls her arms
inward and finally spins at 7.7 7 rad/s.
what is her average angular acceleration
during this time interval?
answer in units of rad/s.

The average angular acceleration of the skater is 0.98 rad/s².

Explanation:

Given:

Initial angular speed of the skater is,

Final angular speed of the skater is,

Time interval for the change is,

We know that, average angular acceleration is given as the ratio of change of angular speed and the time interval.

Therefore, the average angular acceleration is given as:

Hence, the average angular acceleration of the skater is 0.98 rad/s².

i. like it i'm gonna edit it tomorrow

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s