Question

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.

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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

Answer 1

Answer:

The correct answer is B

Explanation:

The moment of an object is the product of its mass by velocity, it is described by the equation

          p = mv

In this problem they give us the most body and speeds before and after the crash. We must define an environment with both bodies so that the forces during the crash have been internalized and the moment is preserved

         Δp = pf -p₀

         Δp = m $v_{f}$ - m v₀

         Δp = 2 9 -2 1.5

         ΔP = 14.8 m/s

The correct answer is b