Question

an object is seen to either speed up, slow down, or change direction. what are these behaviors are caused by?
○ frictional force
○ unbalanced forces
○ a balanced set of forces
○ stable factors

Explanation:

According to Newton's laws, unbalanced forces cause a change in an object's motion, such as speeding up, slowing down, or changing direction. Frictional force is a type of unbalanced force but not the only cause. Balanced forces result in no change in motion, and stable factors are not relevant in this context.

Answer:

B. unbalanced forces