JEE Main Physics question
An object at rest in space suddenly explodes into three parts of the same mass. The momenta of two parts are 2p**î** and p**ĵ**. The momentum of the third part
Answer: (B)
Solution
Total momentum must remain zero: p₃ = −(2pî+pĵ), magnitude = √((2p)²+p²) = p√5.