The following figure represents the required diagram.
Before explosion momentum is given by, Mbe=mucosθ×2 After explosion momentum is given by, Mae=−mucosθ+mv2 Use conservation of momentum. =mucosθ×2=−mucosθ+mv2 mv2=3mucosθ v2=3ucosθ The kinetic energy of first part is given by, E1=
1
2
mv12 =
1
2
m(−ucosθ)2 =
1
2
mu2cos2θ The kinetic energy of second part is given by, E2=