Solution of task 22.1.5 from the collection of Kepe OE

Solution of task 22.1.5 from the collection of Kepe OE

22.1.5
In the collision of a material point M with an obstacle, the angle of incidence? = 30 °, and the angle of reflection? = 36 °. The velocity after impact v2 = 5.1 m / s. Assuming that the barrier is absolutely smooth, determine the value of the speed v1 before the impact. (Response 6.00)