Short Answer Question Answer only ONE of the Following 5 Marks 906 1018vols erit 1. A small ball rolls around a horizontal circle at height y inside a frictionless Ino onibsen hemispherical bowl of radius R, as shown below. $88 (Q N 80 (0 M Res (8 H TAF (A 2R What is the ball's angular velocity in rpm if R = 20 cm and the ball is halfway up? 2. My brother suddenly falls from rest, off a high mountain and simultaneously shouts "BROTHER." When he has fallen for 3.0 s, he hears the echo from the valley floor below. The speed of sound is 340 m/s. (air resistance is neglected.) How tall is the mountain