CollegeBoard SAT Physics Study Guide PT1 Q70

CollegeBoard's Book

70) This question requires us to be able to calculate linear momentum. We can do so with this equation.

Linear Momentum: Where p is momentum, m is mass, and v is velocity

Additionally, we will need to use the conservation of momentum across multiple objects.

Conservation of Momentum: Where p is momentum

It is important to know that the conservation of momentum equation shown above can be adapted depending on the number of objects in the system.

From here, we can plug in our linear momentum equation for each term.

Where m is mass and v is velocity

Now, we just need to plug in all the given values and solve for v[2,f].

Answer: D