Solving a problem in physics section 22 point 72 mechan

72. Acceleration rectilinearly moving material point increases in accordance with a = kt (k-continuous) and a time interval from t1 = 8 reaches a1 = 6 m / s2. Determine at time t2 = 5: 1) speed υ2 point; 2) The point of the path traversed by s2.