7. What is the velocity of an object that has a mass of 4.5 kilograms and momentum of 1,200 kg-m/sec?

266.66 m/s

Explanation:

p=mv

1200=4.5v

v=266.66 m/s

the answer is a. at the equator

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.