A drill bit on a variable - speed drill has a constant angular acceleration of 2.5 rad/s2. The drill has an initial angular speed of 5.00 rad/s (a) after 4.00s, what will the angular displacement of the bit be? (b) What will the drill bits final speed is? Given that the drill bit has a moment of initiator 0.700kg m2 (c) what is the net torque exerted by this drill? (d) What is the rotational kinetic energy of the drill at its final angular speed? (e) If the drill bit breaks off while rotating at an angular speed of 5.00 rad/s and the bits remaining portion has half the inertia of the whole bit, with what angular speed will the bit rotate? (Suppose that there are no non-consrevative forces acting)