Newton's second law: A 7.0-kg object is acted on by two forces. One of the forces is 10.0 N acting toward the east. Which of the following forces is the other force if the acceleration of the object is 1.0 m/s² toward the east? A) 6.0 N east B) 3.0 N west C) 12 N east D) 9.0 N west E) 7.0 N west

Question

Quizplus · Accepted Answer

Using Newton's second law, Fnet = ma, we can find the net force acting on the object:
Fnet = 10.0 N + Fother
Fnet = ma = (7.0 kg)(1.0 m/s^2) = 7.0 N
Solving for Fother:
Fother = Fnet - 10.0 N
Fother = 7.0 N - 10.0 N
Fother = -3.0 N
Since the object is accelerating toward the east, the force acting to the west must be the other force. Therefore, the answer is B) 3.0 N west.

Newton's Second Law: a 7