Solution of task 13.1.3 from the collection of Kepe OE

Solution of task 13.1.3 from the collection of Kepe OE

13.1.3
A detail of mass m = 0.5 kg slides down the tray. At what angle should the tray be located to the horizontal plane in order for the part to move with acceleration a = 2 m / s2? The angle is expressed in degrees. (Answer 11.8)