Respuesta :

Momentum (P) is a vector quantity which is a result of multiplying the object's velocity (v) to its mass (m). 
 
                                              P = mv

If Anya knows the velocity then, she also needs to know the object's mass. The answer is mass. 

lesliejazlynserna318

Well,siince the equation is p=mv and she already has the velocity (v) now she just needs the mass (m).

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