An Object Travels $7.5 \mathrm{~m} / \mathrm{s}$ Toward the West $5.2 \mathrm{kN}$

Multiple Choice

An object travels $7.5 \mathrm{~m} / \mathrm{s}$ toward the west. Under the influence of a constant net force of $5.2 \mathrm{kN}$ , after $4.3 \mathrm{~s}$ , it is travelling $2.5 \mathrm{~m} / \mathrm{s}$ toward the east. What is its mass?

A) $2200 \mathrm{~kg}$
B) $4500 \mathrm{~kg}$
C) $12000 \mathrm{~kg}$
D) $6000 \mathrm{~kg}$