Question

is it possible for an object to move at constant speed without a force pulling or pushing it? a no, a constant force is needed to keep an object moving at constant speed. b no, a force is needed to keep an object moving at constant speed, but it doesnt have to be a constant force. c yes, an object will move at constant speed unless a force acts to change its motion. d yes, an object will move at constant speed as long as the force inside the object doesnt run out.

Explanation:

Newton's first law of motion (inertia) states that an object in motion will stay in motion with a constant velocity (including speed) unless a net external force acts on it. So, an object can move at constant speed without a force pulling or pushing it (once it's in motion, if no net force, it continues). Option C says a force is needed to keep it moving, which is wrong. Option D's "force inside the object" is incorrect (no such internal force for motion maintenance). Option A says a constant force is needed, which is wrong. Option C is incorrect. Wait, re - evaluating: The correct concept is that no force is needed to maintain constant speed (Newton's first law). Wait, the question is "Is it possible for an object to move at constant speed without a force pulling or pushing it?". The correct answer - related option: Wait, let's re - check the options.

Option C: "Yes, an object will move at constant speed unless a force acts to change its motion." This aligns with Newton's first law. Wait, no: Newton's first law says an object in motion will remain in motion with constant velocity (speed and direction) unless a net force acts on it. So, an object can move at constant speed without a force (as long as no net force is acting). Wait, the options:

A: No, a constant force is needed to keep an object moving at constant speed. (Wrong, because according to Newton's first law, no force is needed to maintain constant speed, only to change it.)

B: No, a force is needed to keep an object moving at constant speed, but it doesn't have to be a constant force. (Wrong, because no force is needed to maintain constant speed.)

C: Yes, an object will move at constant speed unless a force acts to change its motion. (This is correct. Because if there's no net force, the object will continue at constant speed. A force is only needed to change the motion (speed or direction).)

D: Yes, an object will move at constant speed as long as the force inside the object doesn't run out. (Wrong, there's no such "internal force" for maintaining motion in the way described.)

So the correct option is C. Wait, no, wait: Wait, the question is "Is it possible for an object to move at constant speed without a force pulling or pushing it?". The answer is yes. And the reasoning is Newton's first law: an object in motion will stay in motion with constant velocity (speed) unless a net external force acts on it. So option C says "Yes, an object will move at constant speed unless a force acts to change its motion." which is correct. Because "unless a force acts to change its motion" means that if no force acts, it will move at constant speed.

Answer:

C. Yes, an object will move at constant speed unless a force acts to change its motion.