(Solved): a.) A wheel (R = 0.200 m) has an initial angular velocity of 12.0 rad/s. It slows down at a constan ...

a.) A wheel (R = 0.200 m) has an initial angular velocity of 12.0 rad/s. It slows down at a constant rate and stops within 4.00 seconds. What is the angular acceleration of the wheel and what is the linear acceleration of a point on the rim? (Ans. a = -3.00 rad/s², a = -0.600 m/s².) c.) Spike usually weighs 890 N (-200 lb). What is his apparent weight at the bottom of the hill (R = 150 m)? (Ans, apparent weight = N=1,430 N = 1.61 mg = Spike weighs 1.61 times as heavy as he usually does.) 30.0 m/s c.) Philadelphia Phillies pitcher Cole Hamels throws a baseball (M = 145 g. R = 26.0 mm) at 45.0 m/s. It rotates at 1,600 rpm. Determine the rotational and translational kinetic energies of the ball. (Ans. Krans = 147 J, K = 59 J.)