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Object a Is Acted on by Only Object B

Question 67

Multiple Choice

Object A is acted on by only object B. The mass of object A is 20.0 kg and its acceleration is 4.00 m/s2 west. Object B is acted on by two forces, the force of object A on object B and another unknown force. If mass of object B is 40.0 kg and the acceleration of object B is 3.00 m/s2 west, what is the unknown force?


A) 40 N west
B) 120 N west
C) 80 N east
D) 200 N west
E) 80 N west

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