Asolid disk of mass m and radius r is moving with a constant angular velocity of w when an external torque begins to slow the disk down. it goes through exactly x revolutions before coming to a stop. a. derive an expression for the net torque applied to the disk. express your answer in terms of the givern variables and fundamental universal constants b. if the force causing the torque had been applied at a ½ the distance, by what factor would the total revolutions completed before stopping change?

Asilver dollar is dropped from the top of a building that is 1324 feet tall. use the position function below for free-falling objects. s(t) = −16t2 + v0t + s0 (a) determine the position and velocity functions for the coin. s(t) = v(t) = (b) determine the average velocity on the interval [1, 2]. ft/s (c) find the instantaneous velocities when t = 1 second and t = 2 seconds. v(1) = ft/s v(2) = ft/s (d) find the time required for the coin to reach the ground level. (round your answer to three decimal places.) t = s (e) find the velocity of the coin at impact. (round your answer to three decimal places.) ft/s