11.3.7
The body 1 moves in a vertical cylindrical tube 2 according to the law se = 1 + 0,3 sin (? / 3) t. The ball M moves along the channel inside the body 1 according to the law M0M = 0.1t3. Determine the absolute acceleration of the ball at time t = 0.5 s, if the angle is known? = 45 °. (Answer .484)