Afigure skater in a tight spin has a rotational inertia of 5.6kgm^2, and an angular velocity of 16 rad/s a) what is her angular momentum? b) what was her angular velocity when she went into the spin if her rotational inertia was 9.8kgm^2 before she tucked?

The angular momentum is 89.6 kg-m^2/s.

The angular velocity is 9.142 rad/s.

Explanation:

Momentum is the product of rotational inertia to the angular velocity.

Angular momentum = m *v = 5.6 * 16 = 89.6 kg-m^2 / s.

Angular velocity is the rate of velocity at which an object is rotating around a center or a specific point in a given time period. It is also known as rotational velocity. Angular velocity is measured in radian per second (rad/s).

angular velocity = angular momentum / rotational inertia

                          = 89.6 / 9.8 = 9.142 rad / s.

u=13

v=30

s/t=u+1\2at

=13+431/2

=13+265.5

=278.5

15.3 cos 65 degrees trig