The old-fashioned record player had two speeds: one for long-playing albums (lp) and one for singles. the turntable speed for lps was 33 1/3 rpm (revolutions per minute). this was equivalent to 100 revolutions every three minutes. the speed of a single was 45 rpm. suppose it took 4.0 seconds for the turntable to ‘speed up’ from 33 1/3 rpm to 45 rpm when a switch was pressed to change the speed. what would be this angular acceleration in rad/sec2?