QUESTION 2 A model airplane with mass, m = 0.50 kg is tethered by a wire so that it flies in a circle 0.20 m in radius. The airplane engine provides a net thrust of
0.6 N perpendicular to tethering wire. Find the angular acceleration of the airplane when it is level flight. (Take moment of inertia I = mr2
O a.
12.6 rad/ s2
Ob.0.58 rad/s2
Oc.
5.08 rad/ s
od 6 rad/s?

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.