Q1. A solid cylindrical disk has a radius of 0.14 m. It is mounted to an axle that is perpendicular to the circular end of the disk at its center. When a 60-N force is applied tangentially to the disk, perpendicular to the radius, disk acquires an angular acceleration of 158 rad/s2. What is the mass of disk?
Q2. An electron is projected vertically upward with a speed of 1.65x10^6 m/s into a uniform magnetic field of 0.160 T that is directed horizontally away from the observer. What would the radius of the circle be?