Section: Solid Mechanics | Type: NAT | Marks: 2
A spherical rigid ball of mass 10 kg is moving with a speed of 2 m/s in the direction shown. The ball collides with a rigid frictionless wall and rebounds at an angle 𝛼 with a speed of 𝑣, as shown. The coefficient of restitution is 0.9. The angle 𝛼 (in degrees) is______(rounded off to one decimal place).
Answer: 57.0 to 58.0