A Car of Mass 10 Kg Moves Eastward at 30

Multiple Choice

A car of mass 10 kg moves eastward at 30 m/s while a second car of mass 30 kg moves at 10 m/s westward. The magnitude of the linear momentum and the kinetic energy of the system are

A) 0 kg.m/s and 3.0 kJ.
B) 600 kg.m/s and 3.0 kJ.
C) 300 kg.m/s and 4.5 kJ.
D) 600 kg.m/s and 6.0 kJ.
E) 0 kg.m/s and 6.0 kJ.