See image — AITS & Test Series Chemistry Question

💡 Solution & Explanation

Applying conservation of angular momentum w. r. t. the centre of earth, 0 0 4 sin 30 , 2 R mv mvR v v    Applying energy conservation   2 2 0 0 1 1 2 2 4 2 GMm GMm m v mv R R    6 0 64 10 40 2 100 / 2 2 GM v m s R       40 2