help to determine tha angular deceleration

298 CHAP. 11 - KINEMATICS-ANGULAR MOTION 11-12 A rotating drive shaft decelerates uniformly from 900 rpm to 650 rpm In 6 s. Determine the angular deceleration and the total number of revolutions In the 6-second time Interval. 11-13 A wheel turns through 500 revolutions while accelerating from 80 to 110 rad/s. Determine the angular acceleration and the time required. 11-14 A revolving vane anemometer turns 40 revolutions in 30 s at constant velocity. Determine angular velocity in (a) rpm and (b) rad/s. 11-15 A pulley rotating at 80 rpm clockwise changes its rotation to 120 rpm counterclockwise in 3 seconds. Determine (a) angular deceleration and (b) the total number of revolutions in the 3 s time period. 11-16 When a power lawn mower is stalled, its blade is brought to rest from a speed of 2000 rpm, turning 250 revolutions in the process. Determine (a) the angular deceleration and (b) the time required for the lawn mower to stop. 11-17 A blcycle wheel held up off the ground is spun at 350 rpm and is then allowed to coast to a stop while turning through 4000 revolutions, How long does it take to stop? (Assume constant deceleration.) 11-18 A flywheel accelerates for 8 s at 1.3 rad/'s from a speed of 40 rpm. Determine (a) the total number of revolutions and (b) the final angular speed. 11-19 A large flywheel used on a punch press is slowed from 70 rpm to JALI 65 rpm in 2 s. Determine its rate of deceleration. Realize your product 11-20 A hand-started motor is accelerated from rest to 150 rpm in 1 s when the rope is pulled. It then starts and, under load, accelerates uniformly to 3600 rpm in 7 seconds. Determine (a) the angular accelera- tion in each case and (b) the total number of revolutions of the motor. 11-21 A large saw blade in a sawmill accelerates from rest to 800 rpm while turning 160 revolutions. Determine the time and the angular accel- oration. 11-22 Starting from rest, a water turbine turns 130 revolutions in accel- erating uniformly to its operating speed of 200 rpm. Determine (a) the angular acceleration; (b) the total time required; and (c) the turbine speed after the first 40 s.Problem 2: In the operational amplifier circuit shown find the voltage gain vo/vi for the following two cases: a) the Op-Amp is ideal, and b) the Op-Amp is ideal except it has a gain of A = 99 V/V. R2= 10 KZ R,= 1Kn Ni R 3 Ry = 1k