Question

A body is rotating from 0 and the relation between the angular acceleration and time is as in the figure below. the angular displacement (theta) at t = 6s

Answer 1

@Michele_Laino

Answer 2

I manged to get the angular displacement till t= 4

I got that it's equal to 4A

Answer 3

areas under the x-axis have to be considered negative, whereas areas over the x-axis have to be considered positive, so at t=4, the angular displqacement is zero: 2A+(-2A)=0