The possible cause of difference in impulse is the change in momentum of the objects in the two problems.
What is impulse?
Impulse is effect produced by applied forces. Impulse is the product of force and time of action.
J = Ft
Change in momentum
Impulse is the change in momentum of an object.
J = ΔP
where;
ΔP is change in momentum
Thus, the possible cause of difference in impulse is the change in momentum of the objects in the two problems.
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