Afigure skater begins spinning counterclock-
wise at an angular speed of 3.6 7 rad/s. dur-
ing a 5.0 s interval, she slowly pulls her arms
inward and finally spins at 8.5 7 rad/s.
what is her average angular acceleration
during this time interval?
answer in units of rad/s.

Ablock of mass m slides on a horizontal frictionless table with an initial speed v0 . it then compresses a spring of force constant k and is brought to rest. the acceleration of gravity is 9.8 m/s2. how much is the spring compressed x from its natural length? 1) x = v0*sqrt(k/(mg)) 2) x=v0*sqrt(m/k) 3) x=v0*((mk)/g) 4) x=v0*sqrt(k/m) 5) x=v0*(m/kg) 6) x=v0*sqrt((mg)/k) 7) x=(v0)^2/(2g) 8) x=v0*(k/(mg)) 9) x=(v0)^2/(2m) 10) x=v0*((mg)/k)