One object (latex: m_1m1) has a mass of 2 kg and moves with a speed of 9 m/s to the right. another object (latex: m_2m2) has a mass of 3 kg and moves to the left with a speed on 3 m/s.

the two objects collide.

after the collision, the first object (latex: m_1m1) moves to the right with a speed of 1.5 m/s. the second object (latex: m_2m2) moves to the right at 2 m/s.



what is the change in the momentum of the first object (latex: m_2m2) during the collision?

choices were

a)-21

b)-15

c)-3

d)-18

e)0

f)21

g)15