Solution of task 15.5.7 from the collection of Kepe OE

Solution of task 15.5.7 from the collection of Kepe OE

15.5.7
The slider 1 with a mass of 2 kg is connected by a hinge with a homogeneous rod 2 of length AB = 1 m and
Weight of 6 kg. The end B of the rod slides along the horizontal plane. Identify
Kinetic energy of the system of bodies, when the velocity vA = 1 m / s and the angle? = 60 °. (Answer 5)