2 asteroids collide head on and stick together. Before collision:
asteroid A :
mass= 1000 kg
moved at 100 m/s

asteroid B:
mass = 2000 kg
moved at 80 m/s (in opposite direction)

How do I calculate velocity of asteroids after collision?

Question

2 asteroids collide head on and stick together.  Before collision:
asteroid A :
mass= 1000 kg 
moved at 100 m/s

asteroid B:
mass = 2000 kg
moved at 80 m/s (in opposite direction)

How do I calculate velocity of asteroids after collision?

badhi · Answer

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if we consider the two objects as one system.. through out the whole scenario there is no momentum difference in the system (since there are no forces acting if we take the system as a whole)
$$m_1v_1 - m_2v_2 = (m_21+m_2)v$$

find v

anonymous · Answer

|dw:1445491262154:dw|
why is it mass 2 * 1?