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.

the small 0.38-kg slider is known to move from position a to position b along the vertical-plane slot. determine (a) the work done on the body by its weight and (b) the work done on the body by the spring. the distance r = 0.70 m, the spring modulus k = 154 n/m, and the unstretched length of the spring is 0.53 m

explanation:

-reverse card

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide