Oblique collision

A particle A suffers an oblique elastic collision particle B that is at rest initially. If their masses with a are the same, then after the collision

Consider an oblique elastic collision between a moving ball and a stationary ball of the same mass. Both the balls move with the same speed after the collision. After the collision, the angle between the directions of motion of two balls is x degree. Find the value of x.

A sphere P of mass m and velocity v_i undergoes an oblique and perfectly elastic collision with an identical sphere Q initially at rest. The angle theta between the velocities of the spheres after the collision shall be

Two identical billiard balls undergo an oblique elastic collision. Initially, one of the balls is stationary. If the initially stationary ball after collision moves in a direction which makes an angle of 37^(@) with direction of initial motion of the moving ball, then the angle through which initially moving ball will be deflected is

A particle of mass m, hits another particle in rest of mass m_2 , obliquely If both the particles after elastic collision moves perpendicular to each other then m_1/m_2

A particle of mass m_1 , hits another particle in rest of mass m_2 , obliquely, If both the particles after elastic collision moves perpendicular to each other then m_1 /m_2 is

Assertion: In inelastic collision, linear momentum of system does not remain constant during collision. But before collision and after collision, it is constant. Reason: In elastic collision, momentum remains constant during collision also.

The number of collisions depends on