assuming the original mass was really 20.0 kg,
total momentum must remain at zero, so
15.0*2 + 5.0v = 0
A 2.0kg object initially at rest explodes breaking into two pieces of mass 5.0kg and 15.0kg. If the 15.0kg piece moves with a speed 2m/s what is the speed of the 5.0kg piece?
A. -6 m/s
B. 15 m/s
C. -5 m/s
D. 20 m/s
2 answers
Yes the original mass was 20.0kg my mistake. According to my calculations the answer will be -6m/s.
1 answer