Rotational Variables (Problem 35)

On takeoff, the propellers on a UAV (unmanned aerial vehicle) increase their angular velocity for 3.0 s from rest at a rate of $\omega =(25.0t)\text{rad}\text{/}\text{s}$ where t is measured in seconds. (a) What is the instantaneous angular velocity of the propellers at $t=2.0\text{s}$? (b) What is the angular acceleration? Select the answer to part (a).