JEE Advanced 2020 Full Test 5 Paper 2

This section contains 02 paragraph each describing theory, experiment, data etc. Four questions relate to the paragraph. Each question of a paragraph has Only One correct answer among the four choices (A),(B),(C) and (D).

Paragraph for Question Nos. 15 and 16

A system consists of two small spheres of mass 1kg and 2kg interconnected by a weightless spring. At t=0, the spheres are set in motion with initial velocities as shown in figure. Position vector of centre of mass at t=0 is 20

∧

j

. Initially spring is in its natural length. System moves in earth's gravitational field.