Final answer:
Indications that forces acting on an object are unbalanced can include the object turning around, the object beginning to move, and the object slowing down. These scenarios can be explained by unbalanced forces causing changes in direction, acceleration from rest, and opposing forces resulting in deceleration.
Step-by-step explanation:
An indication that forces acting on an object are unbalanced is when the object turns around. This is because an unbalanced force can cause a change in direction of the object's motion. For example, when a car is rounding a bend, the force acting towards the center of the curve allows the car to turn.
Another indication of unbalanced forces is when an object begins to move. This is because an unbalanced force can cause an object to accelerate from rest. For instance, when a bowling ball is rolled down a bowling alley, the force exerted on the ball by the bowler causes it to start moving.
Lastly, an object slowing its speed can also be an indication of unbalanced forces. If an object experiences a force in the opposite direction of its motion, it will slow down. For example, when a merry-go-round increases from rest to a constant rotational speed, there is an unbalanced force acting that causes the merry-go-round to accelerate and gain speed.