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Sahay Sir > Question Answers > JEE Mains Physics 2002-2019 Solved Video Solutions > Chapter 4 - Work, Energy and Power > A particle of mass m is moving with speed 2v and collides with a mass 2m moving with speed v in the same direction. After collision the first mass is stopped completely while the second one splits into two particles each of mass m which move at angle 45^° with respect to the original direction. The speed of each of the moving particle will be

A particle of mass m is moving with speed 2v and collides with a mass 2m moving with speed v in the same direction. After collision the first mass is stopped completely while the second one splits into two particles each of mass m which move at angle 45^° with respect to the original direction. The speed of each of the moving particle will be

A body of mass m=10−2kg is moving in a medium and experiences a frictional force F=−KV^2. Its initial speed is υ0=10ms^−2. If after 10s its energy is 1/8mυ^2 0 the value of k will be