Section: Solid Mechanics | Type: NAT | Marks: 2
A sphere A of mass 𝑚 is thrown into the air at 50 m/s along a direction tanିଵሺ3/4ሻ up from the horizontal. At the topmost point of its trajectory, it has a central (non- oblique) collision with another sphere B which is at rest on top of a vertical pole. Sphere B has a mass of 3𝑚. Acceleration due to gravity is 10 m/s2. Neglect contact friction and air-resistance. If the coefficient of restitution is 0.3, then the speed (in m/s) of sphere A immediately after the collision is_________ (rounded off to one decimal place)
Answer: 0.9 to 1.1