Question: A 3.0-kg body is initially moving northward at 15 m/s. Then a force of 15 N, toward the east, acts on it for 4.0 s.

A 3.0-kg body is initially moving northward at 15 m/s. Then a force of 15 N, toward the east, acts on it for 4.0 s.
(a) At the end of the 4.0 s, what is the body's final velocity?
(b) What is the change in momentum during the 4.0 s?

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