Question

question 2
if a force acting on a moving object stops acting, the object will:
stop moving.
move at a slower speed.
speed up.
keep moving at a constant speed.

Explanation:

According to Newton's first law of motion, an object in motion will remain in motion with a constant velocity (constant speed in a straight line) unless acted upon by an external force. When the force acting on the moving object stops, there is no force to change its state of motion (assuming no other forces like friction are present in this idealized case).

Answer:

keep moving at a constant speed.