Final answer:
When two equal forces act in opposite directions on an object, the net force is zero, which means the object will either remain stationary or continue to move at a constant speed if it was already in motion.
The correct statements are option b & c
Step-by-step explanation:
When two equal forces act at the same time on an object, but in exactly opposite directions, the net force acting on the object is zero. According to Newton's first law of motion, an object at rest stays at rest, and an object in motion continues in motion with the same speed and in the same direction unless acted upon by an unbalanced force. Therefore, the correct options are:
C. The object will remain stationary if it was initially at rest, since the net force is zero and there is no change in motion.
B. The object will move at a constant speed if it was already in motion, again due to the net force being zero, which means there is no acceleration and the speed of the object doesn't change.
Options A and D are not correct because there is no net force to cause a change in direction or acceleration.