Use the table to answer the question.

Question

Before After
m1=1.0 kg m2=2.0 kg m1=1.0 kg m2=2.0 kg
v1=2.0 m/s v2=−1 m/s v1=−2.0 m/s v2=1 m/s

Given the data, what is the kinetic energy of the system before and after in this elastic collision?

A) 3 J

B) 0 J

C) -1 J

D) 6 J

Answer 1

D) 6 J