Physics · Rotation · Momentum & Collisions · Work, Energy & Power
Problem
Question Stem for Question Nos. 17 and 18: A uniform circular disk of radius 0.2 m and mass 1 kg is pivoted at its top point C such that it can rotate freely around C in the XY plane, as shown in the figure. Initially, when the disk is at rest, a particle of mass 20 g, travelling along negative x direction in the XY plane with speed 100 m s⁻¹, hits the circumference of the disk at a point P. After collision the particle moves along negative y direction at a speed of 90 m s⁻¹. [Given: the acceleration due to gravity (g) = −10ĵ m s⁻²] After the collision the disk starts to rotate around point C in the XY plane. The maximum change in the height (in m) of its center O is: