Awheel initially spinning at wo = 50.0 rad/s comes to a halt in 20.0 seconds. determine the constant angular acceleration and the number of revolutions it makes before stopping. an athlete is holding a 2.5 meter pole by one end. the pole makes an angle of 60 with the horizontal. the mass of the pole is 4 kg. determine the torque exerted by the pole on the athlete's hand. (the mass of the pole can be assumed to be concentrated at the center of mass.)

An charge with mass m and charge q is emitted from the origin, (x,y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.