Final answer:
Correct option: D all of the claims are true
The student's claim that unbalanced forces acting on an object in motion can cause the object to stop moving, speed up, and change directions is true.
Step-by-step explanation:
The student's claim is that unbalanced forces acting on an object in motion can cause the object to stop moving, speed up, and change directions. The best evaluation of this claim is that all of the claims are true.
When unbalanced forces act on an object, they can cause a change in the object's velocity. If the net force is zero or balanced, the object will continue moving at a constant velocity. If the net force is non-zero or unbalanced, the object will experience an acceleration and its velocity will change.
For example, if a person pushes a car from behind, the car will accelerate and its speed will increase. If the car hits a wall, the unbalanced force from the wall will cause the car to stop moving. And if the car collides with another object at an angle, the unbalanced force from the collision can cause the car to change its direction of motion.