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After getting Kleppner and Kolenkow's second edition textbook I began my exploration of physics. I'm a sophomore in high school and VERY ignorant in regards to physics so if this question make no sense set me straight. I would appreciate it you told me what mistakes I made throughout the problem and how you would solve it.

I devised the following problem for myself:

Asteroid 1 with a Mass of 300 Kg and a Velocity of

**V**= (20

*+ 4*

**i***12*

**j -***) collides with Asteroid 2 with a Mass of 1800 Kg and a Velocity of*

**z****V**= (-3

*32*

**i**- 16**j**-*). What is the Angle between the two Asteroids after the collision? What are the two Asteroid's velocities after the collision?*

**z**1. I found the Momenta of the two asteroids. (

**P1**is Asteroid one's momentum.

**P2**is Asteroid two's momentum.)

Because mass is a scalar quantity, I multiplied the Components of velocity by Mass.

**P1**= 300(20

*+ 4*

**i***12*

**j**-*) = (6000*

**z****+ 1200**

*i***- 12**

*j**)*

**k****P2**= 1800(-3

*32*

**i**- 16**j**-*) = (-5400*

**z****- 28800**

*i***- 57600**

*j***)**

*k*2. Then I got the Angle between the two Momenta Vectors.

*cos (θ) = (*

**P1 ⋅ P2) / |P1||P2| =**72.18

**°**

My problem is that i dont know how to obtain the Asteroid's momentum or Velocity after the collision.

My problem is that i dont know how to obtain the Asteroid's momentum or Velocity after the collision.