14.1.19
Body 1 mass m1 = 0,7 kg can move along the horizontal guide. Determine the acceleration modulus of the body 1 at the time t = 0.25 s, if a body 2 of mass m2 = 0.1 kg moves with respect to it under the action of the internal forces of the system, according to the equation s = sin 4t. (Answer 0.841)