Jack and Jill are skating toward each other. When they collide, they both stop without any other movement. If Jack and Jill make up a closed system, what can be said about the momentum of each person prior to the collision?
Jill’s momentum is greater than Jack’s and in an opposite direction.

They have equal momentum in the same direction.

They have equal momentum in opposite directions.

Jack’s momentum is greater than Jill’s and in an opposite direction.

Question

Jack and Jill are skating toward each other. When they collide, they both stop without any other movement. If Jack and Jill make up a closed system, what can be said about the momentum of each person prior to the collision?
Jill’s momentum is greater than Jack’s and in an opposite direction.
 	
They have equal momentum in the same direction.
 	
They have equal momentum in opposite directions.
 	
Jack’s momentum is greater than Jill’s and in an opposite direction.

18jonea · Answer

@.Sam. 
@jabez177

18jonea · Answer

@osprey

osprey · Answer

if they're moving toward each other, then they're going in opposite directions (join the world of confusion). So first one could be out.
I'd go for the middle one, and sort of imagine that light massed Jill may be hurtling towards hulking Jack, enough to stop him dead in his tracks. how sweet. If i'm right.

18jonea · Answer

so this one T
hey have equal momentum in opposite directions.

18jonea · Answer

@osprey

osprey · Answer

i think so, and maybe a form of "romantic concussion" after the impact ...