Top suggestions for 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 ms −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 ms −1 . [Given: the acceleration due to gravity (g) = − 10 𝑗̂ms−2 ] Q.17 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: Q.18 Amount of energy loss (in J) in the collision is: |