Question

The angular speed of a motor wheel is increased from 1200rpm to 3120rpm in 16sec. What is angular acceleration assuming the acceleration to be uniform

Answer 1

angular acceleration=(final angular velocity-initial angular velocity)÷time taken. Here, initial angular velocity =40πrad./sec. and final angular velocity =52 radian/ sec so angular acceleration = (52-40)÷16=12÷16=3/4radian per sec^2