A 5.0 kg chunk of putty moving at 10.0 m/s collides with and sticks to a 7.0-kg bowling ball that is initially at rest. The bowling ball with its putty passenger will then be set in motion with a momentum of

So if your two objects stick together, it's an inelastic collision. Meaning they will have the same final velocity because after they collide and stick together they become one and move as one. m1= mass of one of the objects, in my case, the chunk of putty.(5.0 kg) v1i=initial velocity of one of the objects that correspond to the mass of that object so the putty.(10m/s) m2=mass of other object, bowling ball (7.0 kg) v2i=initial velocity of other object, bowling ball (at rest, or 0m/s) vf= final velocity

Since we're finding momentum we use the conservation of momentum formula: m1v1i+m2v2i= momentum

So.... (5.0kg X 10.0m/s) + (7.0kg X 0m/s) = 50kg m/s or D