Question

a moving object is in equilibrium. which best describes the motion of the object if no forces change?
it will change directions.
it will slow down and stop.
it will maintain its state of motion.
it will speed up and then slow down.

Explanation:

According to Newton's first law of motion (the law of inertia), an object in equilibrium (net force is zero) will maintain its state of motion (either at rest or moving with a constant velocity) unless acted upon by a net external force. Since no forces change, the moving object will continue with its current motion (constant speed and direction). The option "It will change directions" is incorrect as a net force is needed for a change in direction. "It will slow down and stop" is wrong because that would require a net force (like friction, which isn't mentioned as changing here). "It will speed up and then slow down" also requires net forces to accelerate and decelerate, which aren't present. So the correct description is that it will maintain its state of motion.

Answer:

C. It will maintain its state of motion.